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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Mar. 31, 2017	Apr. 30, 2017
Document Documentand Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Trading Symbol	MRCY
Entity Registrant Name	MERCURY SYSTEMS INC
Entity Central Index Key	0001049521
Current Fiscal Year End Date	--06-30
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		47,992,802

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Jun. 30, 2016
Current assets:
Cash and cash equivalents	$ 270,238	$ 81,691
Accounts receivable, net of allowance for doubtful accounts of $67 and $92 at March 31, 2017 and June 30, 2016, respectively	68,227	73,427
Unbilled receivables and costs in excess of billings	28,389	22,467
Inventory	72,096	58,284
Prepaid income taxes	1,487	3,401
Prepaid expenses and other current assets	7,916	6,122
Total current assets	448,353	245,392
Restricted cash	0	264
Property and equipment, net	47,356	28,337
Estimated fair value of goodwill	365,713	344,027
Intangible assets, net	117,953	116,673
Other non-current assets	2,001	1,803
Total assets	981,376	736,496
Current liabilities:
Accounts payable	24,321	26,723
Accrued expenses	14,600	10,273
Accrued compensation	17,888	13,283
Deferred revenues and customer advances	6,556	7,365
Current portion of long-term debt	10,000	10,000
Total current liabilities	73,365	67,644
Deferred income taxes	7,030	11,842
Income taxes payable	700	700
Long-term debt	176,137	182,275
Other non-current liabilities	12,762	991
Total liabilities	269,994	263,452
Commitments and contingencies (Note M)
Shareholders' equity:
Preferred stock, $0.01 par value; 1,000,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.01 par value; 85,000,000 shares authorized; 46,158,735 and 38,675,340 shares issued and outstanding at March 31, 2017 and June 30, 2016, respectively	461	387
Additional paid-in capital	579,893	357,500
Retained earnings	130,281	114,210
Accumulated other comprehensive income	747	947
Total shareholders' equity	711,382	473,044
Total liabilities and shareholders' equity	$ 981,376	$ 736,496

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Jun. 30, 2016
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 67	$ 92
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	1,000,000	1,000,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	85,000,000	85,000,000
Common Stock, Shares, Issued (shares)	46,158,735	38,675,340
Common stock, shares outstanding (shares)	46,158,735	38,675,340

Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net revenues	$ 107,317	$ 65,898	$ 292,980	$ 184,724
Cost of revenues	56,534	34,496	155,364	95,281
Gross margin	50,783	31,402	137,616	89,443
Operating expenses:
Selling, general and administrative	19,229	12,687	56,093	37,396
Research and development	14,198	8,180	40,192	25,891
Amortization of intangible assets	4,732	1,754	14,222	5,105
Restructuring and other charges	459	409	825	968
Impairment of long-lived assets	0	0	0	231
Acquisition costs and other related expenses	470	1,553	1,889	3,533
Total operating expenses	39,088	24,583	113,221	73,124
Income from operations	11,695	6,819	24,395	16,319
Interest income	137	39	187	89
Interest expense	(1,893)	(3)	(5,613)	(10)
Other income, net	279	144	792	298
Income before income taxes	10,218	6,999	19,761	16,696
Tax provision	3,170	2,642	3,690	4,443
Net income	$ 7,048	$ 4,357	$ 16,071	$ 12,253
Basic net earnings per share (in dollars per share)	$ 0.16	$ 0.13	$ 0.40	$ 0.37
Diluted net earnings per share (in dollars per share)	$ 0.16	$ 0.13	$ 0.39	$ 0.36
Weighted-average shares outstanding:
Basic (in shares)	43,773	33,251	40,573	33,052
Diluted (in shares)	44,814	33,991	41,530	33,830
Comprehensive income:
Net income	$ 7,048	$ 4,357	$ 16,071	$ 12,253
Foreign currency translation adjustments	133	93	(200)	82
Total comprehensive income	$ 7,181	$ 4,450	$ 15,871	$ 12,335

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 16,071	$ 12,253
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	23,139	9,878
Stock-based compensation expense	11,440	7,244
Benefit for deferred income taxes	(5,618)	(1,257)
Impairment of goodwill and long-lived assets	0	231
Non-cash interest expense	1,362	0
Other non-cash items	(628)	(614)
Changes in operating assets and liabilities, net of effects of businesses acquired:
Accounts receivable, unbilled receivable, and cost in excess of billings	2,011	(14,850)
Inventory	(6,615)	(2,351)
Prepaid income taxes	1,913	1,836
Prepaid expenses and other current assets	(1,134)	4,024
Other non-current assets	(116)	(1,008)
Accounts payable and accrued expenses	(566)	7,991
Deferred revenues and customer advances	(777)	(2,230)
Income taxes payable	4,443	2,107
Other non-current liabilities	4,485	(62)
Net cash provided by operating activities	49,410	23,192
Cash flows from investing activities:
Acquisition of business, net of cash acquired	(36,911)	(9,756)
Purchases of property and equipment	(26,789)	(4,908)
Increase in other investing activities	(486)	(567)
Net cash used in investing activities	(64,186)	(15,231)
Cash flows from financing activities:
Proceeds from employee stock plans	2,903	2,804
Payments for retirement of common stock	(7,682)	(4,211)
Proceeds from equity offering, net	215,732	0
Payments of capital lease obligations	(7,500)	0
Net cash provided by (used in) financing activities	203,453	(1,407)
Effect of exchange rate changes on cash and cash equivalents	(130)	105
Net increase in cash and cash equivalents	188,547	6,659
Cash and cash equivalents at beginning of period	81,691	77,586
Cash and cash equivalents at end of period	270,238	84,245
Cash paid during the period for:
Interest	4,251	10
Income taxes	$ 2,731	$ 1,717

Description of Business	9 Months Ended
Description of Business	Mar. 31, 2017
Accounting Policies [Abstract]
Description of Business	Description of Business Mercury Systems, Inc. (the “Company” or “Mercury”) is a leading commercial provider of secure sensor and mission processing subsystems. Optimized for customer and mission success, its solutions power a wide variety of critical defense and intelligence programs. The Company is pioneering a next-generation defense electronics business model specifically designed to meet the industry's current and emerging technology and business needs. The Company delivers affordable innovative solutions, rapid time-to-value and service and support to its defense prime contractor customers. The Company's products and solutions have been deployed in more than 300 programs with over 25 different defense prime contractors. Key programs include Aegis, Patriot, Surface Electronic Warfare Improvement Program ("SEWIP"), Gorgon Stare, F-35, Predator, Reaper, and Paveway. The Company's organizational structure allows it to deliver capabilities that combine technology building blocks and deep domain expertise in the aerospace and defense sector.

Summary of Significant Accounting Policies

9 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

BASIS OF PRESENTATION

The accompanying consolidated financial statements have been prepared by the Company in accordance with accounting principles generally accepted (“GAAP”) in the United States of America for interim financial information and with the instructions to the Form 10-Q and Article 10 of Regulation S-X. Certain information and footnote disclosures normally included in annual consolidated financial statements have been condensed or omitted pursuant to those rules and regulations; however, in the opinion of management the financial information reflects all adjustments, consisting of adjustments of a normal recurring nature, necessary for fair presentation. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes for the fiscal year ended June 30, 2016 which are contained in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on August 16, 2016. The results for the three and nine months ended March 31, 2017 are not necessarily indicative of the results to be expected for the full fiscal year.

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation.

USE OF ESTIMATES

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates.

RECLASSIFICATION

The Company has restated the income tax provision for the three and nine months ended March 31, 2016 by $(169) and $974, respectively, for the adoption of FASB Accounting Standards Update (“ASU”) 2016-09, Improvements to Employee Share-Based Payment Accounting. The adoption resulted in an increase and a decrease in the income tax provision associated with excess tax benefits for the three and nine months ended March 31, 2016, respectively, which previously was reflected as a change in additional paid in capital before the adoption of this ASU. The Company’s Consolidated Statements of Operations and Comprehensive Income and Consolidated Statements of Cash Flows have been updated to reflect this change.

The Company included costs related to the sustainment of its product portfolio as research and development expense, which was previously included as costs of revenues on the Consolidated Statements of Operations and Comprehensive Income. For comparative purposes, for the three and nine months ended March 31, 2016, the Company has reclassified $911 and $2,845, respectively, from costs of revenues to research and development expense.

BUSINESS COMBINATIONS

The Company utilizes the acquisition method of accounting under FASB ASC 805, Business Combinations, (“FASB ASC 805”), for all transactions and events which it obtains control over one or more other businesses, to recognize the fair value of all assets and liabilities acquired, even if less than one hundred percent ownership is acquired, and in establishing the acquisition date fair value as the measurement date for all assets and liabilities assumed. The Company also utilizes FASB ASC 805 for the initial recognition and measurement, subsequent measurement and accounting, and disclosure of assets and liabilities arising from contingencies in business combinations.

FOREIGN CURRENCY

Local currencies are the functional currency for the Company’s subsidiaries in Switzerland, the United Kingdom, and Japan. The accounts of foreign subsidiaries are translated using exchange rates in effect at period-end for assets and liabilities and at average exchange rates during the period for results of operations. Deferred taxes are not recognized for translation-related temporary differences of foreign subsidiaries as their undistributed earnings are considered to be permanently reinvested. The related translation adjustments are reported in accumulated other comprehensive income in shareholders’ equity. Gains (losses) resulting from foreign currency transactions are included in other income, net in the Consolidated Statements of Operations and Comprehensive Income and were immaterial for all periods presented.

REVENUE RECOGNITION

The Company relies upon FASB ASC 605, Revenue Recognition, to account for its revenue transactions. Revenue is recognized upon shipment provided that title and risk of loss have passed to the customer, there is persuasive evidence of an arrangement, the sales price is fixed or determinable, collection of the related receivable is reasonably assured, and customer acceptance criteria, if any, have been successfully demonstrated. Out-of-pocket expenses that are reimbursable by the customer are included in revenue and cost of revenue.

Certain contracts with customers require the Company to perform tests of its products prior to shipment to ensure their performance complies with the Company’s published product specifications and, on occasion, with additional customer-requested specifications. In these cases, the Company conducts such tests and, if they are completed successfully, includes a written confirmation with each order shipped. As a result, at the time of each product shipment, the Company believes that no further customer testing requirements exist and that there is no uncertainty of acceptance by its customer.

The Company uses FASB ASU No. 2009-13 (“FASB ASU 2009-13”), Multiple-Deliverable Revenue Arrangements. FASB ASU 2009-13 establishes a selling price hierarchy for determining the selling price of a deliverable, which includes: (1) vendor-specific objective evidence (“VSOE”) if available; (2) third-party evidence (“TPE”) if VSOE is not available; and (3) best estimated selling price (“BESP”), if neither VSOE nor TPE is available. Additionally, FASB ASU 2009-13 expands the disclosure requirements related to a vendor’s multiple-deliverable revenue arrangements.

The Company enters into multiple-deliverable arrangements that may include a combination of hardware components, related integration or other services. These arrangements generally do not include any performance-, cancellation-, termination- or refund-type provisions. Total revenue recognized under multiple-deliverable revenue arrangements was 37% and 32% of total revenues in the three and nine months ended March 31, 2017, respectively. Total revenue recognized under multiple-deliverable revenue arrangements was 39% and 41% of total revenues in the three and nine months ended March 31, 2016, respectively.

In accordance with the provisions of FASB ASU 2009-13, the Company allocates arrangement consideration to each deliverable in an arrangement based on its relative selling price. The Company generally expects that it will not be able to establish VSOE or TPE due to limited single element transactions and the nature of the markets in which the Company competes, and, as such, the Company typically determines its relative selling price using BESP. The objective of BESP is to determine the price at which the Company would transact if the product or service were sold by the Company on a standalone basis.

The Company's determination of BESP involves the consideration of several factors based on the specific facts and circumstances of each arrangement. Specifically, the Company considers the cost to produce the deliverable, the anticipated margin on that deliverable, the selling price and profit margin for similar parts, the Company’s ongoing pricing strategy and policies (as evident from the price list established and updated by management on a regular basis), the value of any enhancements that have been built into the deliverable and the characteristics of the varying markets in which the deliverable is sold.

The Company analyzes the selling prices used in its allocation of arrangement consideration at a minimum on an annual basis. Selling prices will be analyzed on a more frequent basis if a significant change in the Company’s business necessitates a more timely analysis or if the Company experiences significant variances in its selling prices.

Each deliverable within the Company’s multiple-deliverable revenue arrangements is accounted for as a separate unit of accounting under the guidance of FASB ASU 2009-13 if both of the following criteria are met: the delivered item or items have value to the customer on a standalone basis; and for an arrangement that includes a general right of return relative to the delivered item(s), delivery or performance of the undelivered item(s) is considered probable and substantially in the control of the Company. The Company's revenue arrangements generally do not include a general right of return relative to delivered products. The Company considers a deliverable to have standalone value if the item is sold separately by the Company or another vendor or if the item could be resold by the customer.

Deliverables not meeting the criteria for being a separate unit of accounting are combined with a deliverable that does meet that criterion. The appropriate allocation of arrangement consideration and recognition of revenue is then determined for the combined unit of accounting.

The Company also engages in long-term contracts for development, production and services activities which it accounts for consistent with FASB ASC 605-35, Accounting for Performance of Construction-Type and Certain Production-Type Contracts, and other relevant revenue recognition accounting literature. The Company considers the nature of these contracts and the types of products and services provided when determining the proper accounting for a particular contract. Generally for fixed-price contracts, other than service-type contracts, revenue is recognized primarily under the percentage of completion method or, for certain short-term contracts, by the completed contract method. Revenue from service-type fixed-price contracts is recognized ratably over the contract period or by other appropriate input or output methods to measure service provided, and contract costs are expensed as incurred. The Company establishes billing terms at the time project deliverables and milestones are agreed. The risk to the Company on a fixed-price contract is that if estimates to complete the contract change from one period to the next, profit levels will vary from period to period. For time and materials contracts, revenue reflects the number of direct labor hours expended in the performance of a contract multiplied by the contract billing rate, as well as reimbursement of other billable direct costs. For all types of contracts, the Company recognizes anticipated contract losses as soon as they become known and estimable.

The Company also considers whether contracts should be combined or segmented in accordance with the applicable criteria under GAAP. The Company combines closely related contracts when all the applicable criteria under GAAP are met. The combination of two or more contracts requires judgment in determining whether the intent of entering into the contracts was effectively to enter into a single project, which should be combined to reflect an overall profit rate. Similarly, the Company may separate a project, which may consist of a single contract or group of contracts, with varying rates of profitability, only if the applicable criteria under GAAP are met. Judgment also is involved in determining whether a single contract or group of contracts may be segmented based on how the arrangement was negotiated and the performance criteria. The decision to combine a group of contracts or segment a contract could change the amount of revenue and gross profit recorded in a given period.

The use of contract accounting requires significant judgment relative to estimating total contract revenues and costs, including assumptions relative to the length of time to complete the contract, the nature and complexity of the work to be performed, anticipated increases in wages and prices for subcontractor services and materials, and the availability of subcontractor services and materials. The Company’s estimates are based upon the professional knowledge and experience of its engineers, program managers and other personnel, who review each long-term contract monthly to assess the contract’s schedule, performance, technical matters and estimated cost at completion. Changes in estimates are applied retrospectively and when adjustments in estimated contract costs are identified, such revisions may result in current period adjustments to earnings applicable to performance in prior periods.

Contract costs also may include estimated contract recoveries for matters such as contract changes and claims for unanticipated contract costs. The Company records revenue associated with these matters only when the amount of recovery can be estimated reliably and realization is probable.

The Company defines service revenues as revenue from activities that are not associated with the design, development, production, or delivery of tangible assets, software or specific capabilities sold. Examples of the Company's service revenues include: analyst services and systems engineering support, consulting, maintenance and other support, testing and installation. The Company combines its product and service revenues into a single class as service revenues are less than 10 percent of total revenues.

The Company does not provide its customers with rights of product return, other than those related to warranty provisions that permit repair or replacement of defective goods. The Company accrues for anticipated warranty costs upon product shipment. Revenues from product royalties are recognized upon invoice by the Company. Additionally, all revenues are reported net of government assessed taxes (e.g., sales taxes or value-added taxes).

WEIGHTED-AVERAGE SHARES

Weighted-average shares were calculated as follows:



	Three Months Ended March 31,		Nine Months Ended March 31,
	2017	2016	2017	2016
Basic weighted-average shares outstanding	43,773	33,251	40,573	33,052
Effect of dilutive equity instruments	1,041	740	957	778
Diluted weighted-average shares outstanding	44,814	33,991	41,530	33,830

Equity instruments to purchase 9 and 13 shares of common stock were not included in the calculation of diluted net earnings per share for the three and nine months ended March 31, 2017 because the equity instruments were anti-dilutive. Equity instruments to purchase 26 and 4 shares of common stock were not included in the calculation of diluted net earnings per share for the three and nine months ended March 31, 2016 because the equity instruments were anti-dilutive.

On January 26, 2017, the Company entered into an underwriting agreement. Pursuant to the terms and conditions of the underwriting agreement, the Company agreed to sell 6,000 shares of common stock, par value $0.01 per share, at a price to the public of $33.00 per share and granted the underwriters an option to purchase up to an additional 900 shares of its common stock within 30 days after the date of the underwriting agreement to cover over-allotments. On February 1, 2017, the Company closed the offering, including the full over-allotment allocation, selling an aggregate of 6,900 shares of common stock for total net proceeds of $215,732.

Acquisitions

9 Months Ended

Mar. 31, 2017

Business Combinations [Abstract]

Acquisitions

CES CREATIVE ELECTRONIC SYSTEMS AQUISITION

On November 4, 2016, the Company and the shareholders of CES Creative Electronic Systems S.A. ("CES") entered into a Stock Purchase Agreement, pursuant to which, Mercury acquired CES for a total purchase price of $39,123, subject to net working capital and net debt adjustments. The acquisition and associated transaction expenses were funded with cash on hand. Based in Geneva, Switzerland, CES is a leading provider of embedded solutions for military and aerospace mission-critical computing applications. CES specializes in the design, development and manufacture of safety-certifiable product and subsystems solutions including: primary flight control units, flight test computers, mission computers, command and control processors, graphics and video processing and avionics-certified Ethernet and IO. CES has decades of experience designing subsystems deployed in applications certified up to the highest levels of design assurance. CES products and solutions are used on platforms such as aerial refueling tankers and multi-mission aircraft, as well as the several types of unmanned platforms.

The following table presents the net purchase price and the preliminary fair values of the assets and liabilities of CES:



	Amounts
Consideration transferred
Cash paid at closing	$	39,123
Working capital adjustment	(330		)
Net purchase price	$	38,793

Estimated fair value of tangible assets acquired and liabilities assumed
Accounts receivable and cost in excess of billings	$	2,698
Inventory	7,262
Fixed assets	1,468
Current and non-current deferred tax assets	312
Other current and non-current assets	1,087
Current liabilities	(3,141		)
Non-current liabilities	(8,031		)
Non-current deferred tax liabilities	(1,169		)
Estimated fair value of net tangible assets acquired	486
Estimated fair value of identifiable intangible assets	15,134
Estimated goodwill	23,173
Estimated fair value of net assets acquired	38,793
Net purchase price	$	38,793

The amounts above represent the preliminary fair value estimates as of March 31, 2017 and are subject to subsequent adjustment as the Company obtains additional information during the measurement period. The preliminary identifiable intangible asset estimates include customer relationships of $9,472 with a useful life of 9 years and developed technology of $5,662 with a useful life of 7 years. Any subsequent adjustments to these fair value estimates occurring during the measurement period will result in an adjustment to goodwill.

The goodwill of $23,173 largely reflects the potential synergies and expansion of the Company's offerings across product lines and markets complementary to the Company's existing products and markets. CES provides the Company with capabilities in mission computing, safety-critical avionics and platform management that are in demand from its customers. These new capabilities will also substantially expand Mercury’s addressable market into commercial aerospace, defense platform management, C4I and mission computing markets that are aligned to Mercury’s existing market focus. The acquisition is directly aligned with the Company's strategy of expanding its capabilities, services and offerings along the sensor processing chain. The goodwill from this acquisition is reported under the MCE reporting unit.

The revenues and income before income taxes from CES included in the Company's consolidated results for the three months ended March 31, 2017 were $6,367 and $668, respectively. The revenues and income before income taxes from CES included in the Company's consolidated results for the nine months ended March 31, 2017 were $10,323 and $923, respectively.

CARVE-OUT BUSINESS AQUISITION

On March 23, 2016, the Company and Microsemi Corporation (“Microsemi”) entered into a Stock Purchase Agreement, pursuant to which Microsemi agreed to sell all the membership interests in its custom microelectronics, RF and microwave solutions and embedded security operations (the “Carve-Out Business”) to the Company for $300,000 in cash on a cash-free, debt-free basis, subject to a working capital adjustment. On May 2, 2016, the transaction closed and the Company acquired the Carve-Out Business. Pursuant to the terms of the Stock Purchase Agreement, all outstanding Carve-Out Business employee stock awards that were unvested at the closing were replaced by Mercury. The replacement stock awards granted were determined based on a conversion ratio provided in the Stock Purchase Agreement. Mercury funded the acquisition with a combination of a new $200,000 bank term loan facility (see Note I) and cash on hand, which included net proceeds of approximately $92,788 raised from an underwritten common stock public offering. In February 2017, the Company received a $1,838 cash payment from Microsemi relating to a working capital adjustment pursuant to the terms of the Stock Purchase Agreement. The payout has been reflected as an adjustment to the net purchase price, resulting in a net decrease to goodwill in an equal amount.

The following table presents the net purchase price and the preliminary fair values of the assets and liabilities of the Carve-Out Business:



	Amounts
Consideration transferred
Cash paid at closing	$	300,000
Value allocated to replacement awards	407
Working capital adjustment	(1,838		)
Net purchase price	$	298,569

Estimated fair value of tangible assets acquired and liabilities assumed
Accounts receivable and cost in excess of billings	$	17,157
Inventory	25,477
Fixed assets	13,996
Other current and non-current assets	524
Current liabilities	(4,692		)
Non-current deferred tax liabilities	(25,449		)
Estimated fair value of net tangible assets acquired	27,013
Estimated fair value of identifiable intangible assets	102,800
Estimated goodwill	168,756
Estimated fair value of net assets acquired	298,569
Net purchase price	$	298,569

The amounts above represent the preliminary fair value estimates as of March 31, 2017 and are subject to subsequent adjustment as the Company obtains additional information during the measurement period and finalizes its fair value estimates. The preliminary identifiable intangible asset estimates include customer relationships of $70,900, completed technology of $29,700 and backlog of $2,200. Any subsequent adjustments to these fair value estimates occurring during the measurement period, which ends on May 1, 2017, will result in an adjustment to goodwill.

The goodwill of $168,756 largely reflects the potential synergies and expansion of the Company's offerings across product lines and markets complementary to the Company's existing products and markets. The Carve-Out Business provides the Company with additional capability and expertise related to embedded security, custom microelectronics, and microwave and radio frequency ("RF") technology. The acquisition is directly aligned with the Company's strategy of expanding its capabilities, services and offerings along the sensor processing chain. The goodwill from this acquisition is reported under the Carve-Out Business reporting unit. As of March 31, 2017, the Company had $27,166 of goodwill related to the Carve-Out Business deductible for tax purposes.

The revenues and income before income taxes from the Carve-Out Business included in the Company's consolidated results for the three months ended March 31, 2017 were $25,870 and $(284), respectively. The revenues and income before income taxes from the Carve-Out Business included in the Company's consolidated results for the nine months ended March 31, 2017 were $76,108 and $(4,197), respectively.

Pro Forma Financial Information

The following tables summarize the supplemental statements of operations information on an unaudited pro forma basis as if the Carve-Out Business acquisition had occurred on July 1, 2015:



	Three Months ended March 31,		Nine Months ended March 31,
	2016		2016
Pro forma net revenues	$	90,023	$	258,519
Pro forma net income	$	4,081	$	11,161
Basic pro forma net earnings per share	$	0.11	$	0.29
Diluted pro forma net earnings per share	$	0.10	$	0.29

The unaudited pro forma results presented above are for illustrative purposes only for the applicable periods and do not purport to be indicative of the actual results which would have occurred had the transaction been completed as of the beginning of the period, nor are they indicative of results of operations which may occur in the future.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1497-128463

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1490-128463

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1486-128463

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Fair Value of Financial Instruments

9 Months Ended

Mar. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

The following table summarizes the Company’s financial assets measured at fair value on a recurring basis at March 31, 2017:



	Fair Value Measurements
	March 31, 2017		Level 1		Level 2		Level 3
Assets:
Certificates of deposit	$	100,057	$	—	$	100,057	$	—
Total	$	100,057	$	—	$	100,057	$	—

The carrying values of cash and cash equivalents, including money market funds, restricted cash, accounts receivable and payable, and accrued liabilities approximate fair value due to the short-term maturities of these assets and liabilities. The fair value of the Company’s certificates of deposit are determined through quoted prices for identical or similar instruments in markets that are not active or are directly or indirectly observable. The Company determined the face value of its long-term debt approximates fair value at March 31, 2017 due to the recent issuance and stability of interest rates during this period. The Company has an immaterial cost-method investment. The cost-method investment, which is presented within other non-current assets in the accompanying Consolidated Balance Sheets, does not have a readily determinable fair value, as such the Company recorded the investment at cost and will continue to evaluate the asset for impairment on a quarterly basis.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Inventory

9 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Inventory

Inventory is stated at the lower of cost (first-in, first-out) or market value, and consists of materials, labor and overhead. On a quarterly basis, the Company uses consistent methodologies to evaluate inventory for net realizable value. Once an item is written down, the value becomes the new inventory cost basis. The Company reduces the value of inventory for excess and obsolete inventory, consisting of on-hand inventory in excess of estimated usage. The excess and obsolete inventory evaluation is based upon assumptions about future demand, history, product mix and possible alternative uses. Inventory was comprised of the following:



	March 31, 2017		June 30, 2016
Raw materials	$	39,039	$	31,205
Work in process	22,964		15,967
Finished goods	10,093		11,112
Total	$	72,096	$	58,284

The $13,812 increase in inventory was primarily due to the inclusion of inventory from CES. There are no amounts in inventory relating to contracts having production cycles longer than one year.

Goodwill

9 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

The following table sets forth the changes in the carrying amount of goodwill by reporting unit for the nine months ended March 31, 2017:



	MCE		MDS		Carve-Out Business			Total
Balance at June 30, 2016	$	134,378	$	39,406	$	170,243		$	344,027
Goodwill adjustment for the Carve-Out Business acquisition	—		—		(1,487		)	(1,487		)
Goodwill arising from the CES acquisition	23,173		—		—			23,173
Balance at March 31, 2017	$	157,551	$	39,406	$	168,756		$	365,713

During the nine months ended March 31, 2017, the Company recorded a $(1,487) adjustment to goodwill related to the acquisition of the Carve-Out Business. The adjustments were related to the finalization of a working capital adjustment offset by changes in fair value estimates derived from additional information obtained during the measurement period.

In the nine months ended March 31, 2017, there were no triggering events, as defined by FASB ASC 350, Intangibles - Goodwill and Other, which required an interim goodwill impairment test. The Company performs its annual goodwill impairment test in the fourth quarter of each fiscal year.

Restructuring Plan

9 Months Ended

Mar. 31, 2017

Restructuring and Related Activities [Abstract]

Restructuring Plan

Restructuring

The following table presents the detail of activity for the Company’s restructuring plans:



	Severance & Related			Facilities & Other			Total
Restructuring liability at June 30, 2016	$	190		$	736		$	926
Restructuring and other charges	550			275			825
Cash paid	(384		)	(867		)	(1,251		)
Restructuring liability at March 31, 2017	$	356		$	144		$	500

During the nine months ended March 31, 2017, the Company incurred net restructuring and other charges of $825. Restructuring and other charges are typically related to acquisitions and organizational redesign programs initiated as part of discrete post-acquisition integration activities.

All of the restructuring and other charges are classified as operating expenses in the Consolidated Statements of Operations and Comprehensive Income and any remaining severance obligations are expected to be paid within the next twelve months. The restructuring liability is classified as accrued expenses in the Consolidated Balance Sheets.

Income Taxes	9 Months Ended
Income Taxes	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded an income tax provision of $3,170 and $2,642 on income from operations before income taxes of $10,218 and $6,999 for the three months ended March 31, 2017 and 2016, respectively. The Company recorded an income tax provision of $3,690 and $4,443 on income from operations before income taxes of $19,761 and $16,696 for the nine months ended March 31, 2017 and 2016, respectively. The effective tax rate for the three and nine months ended March 31, 2017 and 2016 differed from the federal statutory rate primarily due to federal research and development credits, domestic manufacturing deduction, excess tax benefits related to stock compensation, and state taxes. No material changes in the Company’s unrecognized tax positions occurred during the nine months ended March 31, 2017. The Company is currently under audit by the Internal Revenue Service for fiscal year 2013. There have been no significant changes to the status of this examination during the nine months ended March 31, 2017. It is reasonably possible that within the next 12 months the Company’s unrecognized tax benefits, exclusive of interest, may decrease by up to $757 at the conclusion of the audit. The Company expects that the decrease, if recognized, would not affect the effective tax rate.

Debt	9 Months Ended
Debt	Mar. 31, 2017
Debt Disclosure [Abstract]
Debt	Debt TERM LOAN AND REVOLVING CREDIT FACILITIES On May 2, 2016, the Company and certain of its subsidiaries, as guarantors, entered into a Credit Agreement (the “Credit Agreement”) with a syndicate of commercial banks and Bank of America, N.A acting as the administrative agent. The Credit Agreement provides for a $200,000 term loan facility ("Term Loan") and a $100,000 revolving credit facility ("Revolver"). As of March 31, 2017, the Company’s outstanding balance on the Term Loan was $192,500, before $6,363 of unamortized debt issuance costs. The stated interest rate of the Term Loan was 3.2% as of March 31, 2017. The Company was in compliance with all covenants and conditions under the Credit Agreement and there were no borrowings against the Revolver. There were outstanding letters of credit of $5,168 as of March 31, 2017.

Stock-Based Compensation

9 Months Ended

Mar. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

STOCK OPTION PLANS

The number of shares authorized for issuance under the Company’s 2005 Stock Incentive Plan, as amended and restated (the “2005 Plan”), is 15,252 shares at March 31, 2017. The 2005 Plan provides for the grant of non-qualified and incentive stock options, restricted stock, stock appreciation rights and deferred stock awards to employees and non-employees. All stock options are granted with an exercise price of not less than 100% of the fair value of the Company’s common stock at the date of grant and the options generally have a term of seven years. There were 2,823 shares available for future grant under the 2005 Plan at March 31, 2017.

As part of the Company's ongoing annual equity grant program for employees, the Company grants performance-based restricted stock awards to certain executives pursuant to the 2005 Plan. Performance awards vest based on the requisite service period subject to the achievement of specific financial performance targets. Based on the performance targets, some of these awards require graded vesting which results in more rapid expense recognition compared to traditional time-based vesting over the same vesting period. The Company monitors the probability of achieving the performance targets on a quarterly basis and may adjust periodic stock compensation expense accordingly.

EMPLOYEE STOCK PURCHASE PLAN

The number of shares authorized for issuance under the Company’s 1997 Employee Stock Purchase Plan, as amended and restated (“ESPP”), is 1,800 shares. Under the ESPP, rights are granted to purchase shares of common stock at 85% of the lesser of the market value of such shares at either the beginning or the end of each six-month offering period. The ESPP permits employees to purchase common stock through payroll deductions, which may not exceed 10% of an employee’s compensation as defined in the ESPP. There were 50 and 46 shares issued under the ESPP during the nine months ended March 31, 2017 and 2016, respectively. Shares available for future purchase under the ESPP totaled 348 at March 31, 2017.

STOCK OPTION AND AWARD ACTIVITY

The following table summarizes activity of the Company’s stock option plans since June 30, 2016:



	Options Outstanding
	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)
Outstanding at June 30, 2016	258		$	13.34	1.06
Granted	—		—
Exercised	(138	)	13.34
Canceled	—		—
Outstanding at March 31, 2017	120		$	13.34	0.56

The following table summarizes the status of the Company’s non-vested restricted stock awards since June 30, 2016:



	Non-vested Restricted Stock Awards
	Number of Shares		Weighted Average Grant Date Fair Value
Outstanding at June 30, 2016	1,666		$	13.09
Granted	686		24.15
Vested	(711	)	11.46
Forfeited	(49	)	14.83
Outstanding at March 31, 2017	1,592		$	18.54

STOCK-BASED COMPENSATION EXPENSE

The Company recognized the full expense of its share-based payment plans in the consolidated statements of operations for the nine months ended March 31, 2017 and 2016 in accordance with FASB ASC 718, Compensation - Stock Compensation. The Company had $177 and $114 of capitalized stock-based compensation expense on the Consolidated Balance Sheets as of March 31, 2017 and 2016, respectively. Under the fair value recognition provisions of FASB ASC 718, stock-based compensation cost is measured at the grant date based on the value of the award and is recognized as expense over the service period, net of estimated forfeitures. The following table presents share-based compensation expenses included in the Company’s consolidated statements of operations:



	Three Months Ended March 31,						Nine Months Ended March 31,
	2017			2016			2017			2016
Cost of revenues	$	150		$	152		$	373		$	307
Selling, general and administrative	3,270			1,802			9,848			5,993
Research and development	295			196			1,219			944
Share-based compensation expense before tax	3,715			2,150			11,440			7,244
Income taxes	(1,418		)	(805		)	(4,381		)	(2,838		)
Share-based compensation expense, net of income taxes	$	2,297		$	1,345		$	7,059		$	4,406

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References + Details

Pension Pension	9 Months Ended
Pension Pension	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Pension	Pension DEFINED BENEFIT PLAN With the acquisition of CES on November 4, 2016, the Company assumed a pension plan (the "Plan") for Swiss employees, mandated by Swiss law. The Plan meets the criteria for a defined benefit plan under U.S. GAAP. The Company recognizes a net asset or liability for this defined benefit pension plan equal to the difference between the projected benefit obligation of the Plan and the fair value of the Plan’s assets. The funded status may vary from year to year due to changes in the fair value of the Plan’s assets and variations on the underlying assumptions of the Plan. At the acquisition date, the Company recorded a liability of approximately $7,658 in other non-current liabilities representing the net funded status of the Plan. As described in Note C of the consolidated financial statements, the fair values of the assets acquired and liabilities assumed from CES are preliminary estimates, including the estimate of the net liability associated with the Plan. This estimate is subject to subsequent adjustment as the Company obtains additional information during the measurement period and any subsequent adjustments to this fair value estimate occurring during the measurement period will result in an adjustment to goodwill. The Company recognized net periodic benefit costs of $199 associated with the Plan from the acquisition date of November 4, 2016 through March 31, 2017. Fiscal 2017 cash contributions to the Plan are expected to be $330.

Operating Segment, Geographic Information and Significant Customers

9 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Operating Segment, Geographic Information and Significant Customers

Operating segments are defined as components of an enterprise evaluated regularly by the Company's chief operating decision maker (“CODM”) in deciding how to allocate resources and assess performance. The Company is comprised of one operating and reportable segment. The Company utilized the management approach for determining its operating segment in accordance with FASB ASC 280, Segment Reporting.

The geographic distribution of the Company’s revenues as determined by order origination based on the country in which the Company's legal subsidiary is domiciled is summarized as follows:



	U.S.		Europe		Asia Pacific		Eliminations			Total
THREE MONTHS ENDED MARCH 31, 2017
Net revenues to unaffiliated customers	$	98,599	$	8,085	$	633	$	—		$	107,317
Inter-geographic revenues	1,745		21		—		(1,766		)	—
Net revenues	$	100,344	$	8,106	$	633	$	(1,766	)	$	107,317
THREE MONTHS ENDED MARCH 31, 2016
Net revenues to unaffiliated customers	$	62,675	$	1,742	$	1,481	$	—		$	65,898
Inter-geographic revenues	1,598		18		—		(1,616		)	—
Net revenues	$	64,273	$	1,760	$	1,481	$	(1,616	)	$	65,898
NINE MONTHS ENDED MARCH 31, 2017
Net revenues to unaffiliated customers	$	273,054	$	14,747	$	5,179	$	—		$	292,980
Inter-geographic revenues	6,925		36		—		(6,961		)	—
Net revenues	$	279,979	$	14,783	$	5,179	$	(6,961	)	$	292,980
NINE MONTHS ENDED MARCH 31, 2016
Net revenues to unaffiliated customers	$	178,249	$	2,852	$	3,623	$	—		$	184,724
Inter-geographic revenues	4,800		420		—		(5,220		)	—
Net revenues	$	183,049	$	3,272	$	3,623	$	(5,220	)	$	184,724

In recent years, the Company completed a series of acquisitions that changed its technological capabilities, applications and end markets. As these acquisitions and changes occurred, the Company increased the proportion of its revenue derived from the sale of components in different technological areas, and also increased the amount of revenue associated with combining technologies into more complex and diverse products including modules, sub-assemblies and integrated subsystems. The following tables present revenue consistent with the Company's strategy of expanding its technological capabilities and program content.



	Three Months Ended March 31,				Nine Months Ended March 31,
	2017		2016		2017		2016
Domestic (1)	$	87,765	$	52,054	$	244,343	$	149,826
International/Foreign Military Sales (2)	19,552		13,844		48,637		34,898
Total Net Revenue	$	107,317	$	65,898	$	292,980	$	184,724

(1) Domestic revenues consist of sales where the end user is within the U.S., as well as sales to prime defense contractor customers where the ultimate end user location is not defined.

(2) International/Foreign Military Sales consist of sales to U.S. prime defense contractor customers where the end user is outside the U.S., foreign military sales through the U.S. government, and direct sales to non-U.S. based customers intended for end use outside of the U.S.

The following table below presents the Company's net revenue by end application for the periods presented:



	Three Months Ended March 31,				Nine Months Ended March 31,
	2017		2016		2017		2016
Radar (1)	$	33,017	$	39,207	$	115,308	$	103,925
Electronic Warfare (2)	35,920		17,915		78,204		51,136
Other (3)	38,380		8,776		99,468		29,663
Total Net Revenue	$	107,317	$	65,898	$	292,980	$	184,724

(1) Radar includes end-use applications where radio frequency signals are utilized to detect, track, and identify objects.

(2) Electronic Warfare includes end-use applications comprising the offensive and defensive use of the electromagnetic spectrum.

(3) Other products include all end markets other than Radar and Electronic Warfare. Examples include but are not limited to various commercial and other end-use applications and technologies, as well as various component and other sales where the end use is not specified.

The following table below presents the Company's net revenue by product grouping for the periods presented:



	Three Months Ended March 31,				Nine Months Ended March 31,
	2017		2016		2017		2016
Components (1)	$	26,920	$	5,179	$	74,126	$	16,838
Modules and Sub-assemblies (2)	43,330		34,061		115,744		90,680
Integrated Subsystems (3)	37,067		26,658		103,110		77,206
Total Net Revenue	$	107,317	$	65,898	$	292,980	$	184,724

(1) Components include technology elements typically performing a single, discrete technological function, which when physically combined with other components may be used to create a module or sub-assembly. Examples include but are not limited to power amplifiers and limiters, switches, oscillators, filters, equalizers, digital and analog converters, chips, MMICs (monolithic microwave integrated circuits), and memory and storage devices.

(2) Modules and Sub-assemblies include combinations of multiple functional technology elements and/or components that work together to perform multiple functions but are typically resident on or within a single board or housing. Modules and sub-assemblies may in turn be combined to form an integrated subsystem. Examples of modules and sub-assemblies include but are not limited to embedded processing modules, embedded processing boards, switch fabric boards, high speed input/output boards, digital receiver boards, graphics and video processing and Ethernet and IO (input-output) boards, multi-chip modules, integrated radio frequency and microwave multi-function assemblies, tuners, and transceivers.

(3) Integrated Subsystems include multiple modules and/or subassemblies combined with a backplane or similar functional element and software to enable a solution. These are typically but not always integrated within a chassis and with cooling, power and other elements to address various requirements and are also often combined with additional technologies for interaction with other parts of a complete system or platform. Integrated subsystems also include spare and replacement modules and sub-assemblies sold as part of the same program for use in or with integrated subsystems sold by the Company.

The geographic distribution of the Company’s long-lived assets is summarized as follows:



	U.S.		Europe		Asia Pacific		Eliminations		Total
March 31, 2017	$	45,890	$	1,448	$	18	$	—	$	47,356
June 30, 2016	$	28,187	$	127	$	23	$	—	$	28,337

Identifiable long-lived assets exclude goodwill and intangible assets.

Customers comprising 10% or more of the Company’s revenues for the periods shown below are as follows:



	Three Months Ended March 31,				Nine Months Ended March 31,
	2017		2016		2017		2016
Raytheon Company	14	%	17	%	17	%	28	%
Lockheed Martin Corporation	27	%	26	%	22	%	23	%
Northrop Grumman Corporation	*		14	%	*		*
	41	%	57	%	39	%	51	%

While the Company typically has customers from which it derives 10% or more of its revenue, the sales to each of these customers are spread across multiple programs and platforms. Programs comprising 10% or more of the Company’s revenues for the periods shown below are as follows:



	Three Months Ended March 31,				Nine Months Ended March 31,
	2017		2016		2017		2016
SEWIP	18	%	12	%	*		12	%
Patriot	*		*		*		11	%
	18	%	12	%	—	%	23	%


*	Indicates that the amount is less than 10% of the Company’s revenues for the respective period.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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+ Details

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies LEGAL CLAIMS The Company is subject to litigation, claims, investigations and audits arising from time to time in the ordinary course of our business. Although legal proceedings are inherently unpredictable, the Company believes that it has valid defenses with respect to any matters currently pending against the Company and intends to defend itself vigorously. The outcome of these matters, individually and in the aggregate, is not expected to have a material impact on the Company’s cash flows, results of operations, or financial position. INDEMNIFICATION OBLIGATIONS The Company’s standard product sales and license agreements entered into in the ordinary course of business typically contain an indemnification provision pursuant to which the Company indemnifies, holds harmless, and agrees to reimburse the indemnified party for losses suffered or incurred by the indemnified party in connection with any patent, copyright or other intellectual property infringement claim by any third party with respect to the Company’s products. Such provisions generally survive termination or expiration of the agreements. The potential amount of future payments the Company could be required to make under these indemnification provisions is, in some instances, unlimited. PURCHASE COMMITMENTS As of March 31, 2017, the Company has entered into non-cancelable purchase commitments for certain inventory components and services used in its normal operations. The purchase commitments covered by these agreements are for less than one year and aggregate to $36,688. OTHER As part of the Company's strategy for growth, the Company continues to explore acquisitions or strategic alliances. The associated acquisition costs incurred in the form of professional fees and services may be material to the future periods in which they occur, regardless of whether the acquisition is ultimately completed. The Company may elect from time to time to purchase and subsequently retire shares of common stock in order to settle an individual employees’ tax liability associated with vesting of a restricted stock award or exercise of stock options. These transactions would be treated as a use of cash in financing activities in the Company's statement of cash flows.

Subsequent Events	9 Months Ended
Subsequent Events	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On April 3, 2017, the Company entered into a membership interest purchase agreement with Delta Microwave, LLC ("Delta"), pursuant to which, Mercury acquired Delta on a cash-free, debt-free basis for a total purchase price of $40,500, subject to net working capital and net debt adjustments. Delta is a leading designer and manufacturer of high-value RF, microwave and millimeter wave sub-assemblies and components for the military, aerospace and space markets. The acquisition and transaction related expenses were funded with cash on hand. The Company has evaluated subsequent events from the date of the consolidated balance sheet through the date the consolidated financial statements were issued.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Basis of Presentation

BASIS OF PRESENTATION

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation

Use of Estimates

USE OF ESTIMATES

Reclassification

RECLASSIFICATION

Business Combinations

BUSINESS COMBINATIONS

Foreign Currency

FOREIGN CURRENCY

Revenue Recognition

REVENUE RECOGNITION

Weighted-Average Shares

WEIGHTED-AVERAGE SHARES

Weighted-average shares were calculated as follows:



	Three Months Ended March 31,		Nine Months Ended March 31,
	2017	2016	2017	2016
Basic weighted-average shares outstanding	43,773	33,251	40,573	33,052
Effect of dilutive equity instruments	1,041	740	957	778
Diluted weighted-average shares outstanding	44,814	33,991	41,530	33,830

Summary of Significant Accounting Policies (Tables)

9 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Basic and Diluted Weighted Average Shares Outstanding

WEIGHTED-AVERAGE SHARES

Weighted-average shares were calculated as follows:



	Three Months Ended March 31,		Nine Months Ended March 31,
	2017	2016	2017	2016
Basic weighted-average shares outstanding	43,773	33,251	40,573	33,052
Effect of dilutive equity instruments	1,041	740	957	778
Diluted weighted-average shares outstanding	44,814	33,991	41,530	33,830

Acquisitions (Tables)

9 Months Ended

Mar. 31, 2017

Business Combinations [Abstract]

Schedule of the Net Purchase Price and Fair Values of Assets and Liabilities Acquired

The following table presents the net purchase price and the preliminary fair values of the assets and liabilities of the Carve-Out Business:



	Amounts
Consideration transferred
Cash paid at closing	$	300,000
Value allocated to replacement awards	407
Working capital adjustment	(1,838		)
Net purchase price	$	298,569

Estimated fair value of tangible assets acquired and liabilities assumed
Accounts receivable and cost in excess of billings	$	17,157
Inventory	25,477
Fixed assets	13,996
Other current and non-current assets	524
Current liabilities	(4,692		)
Non-current deferred tax liabilities	(25,449		)
Estimated fair value of net tangible assets acquired	27,013
Estimated fair value of identifiable intangible assets	102,800
Estimated goodwill	168,756
Estimated fair value of net assets acquired	298,569
Net purchase price	$	298,569

The following table presents the net purchase price and the preliminary fair values of the assets and liabilities of CES:



	Amounts
Consideration transferred
Cash paid at closing	$	39,123
Working capital adjustment	(330		)
Net purchase price	$	38,793

Estimated fair value of tangible assets acquired and liabilities assumed
Accounts receivable and cost in excess of billings	$	2,698
Inventory	7,262
Fixed assets	1,468
Current and non-current deferred tax assets	312
Other current and non-current assets	1,087
Current liabilities	(3,141		)
Non-current liabilities	(8,031		)
Non-current deferred tax liabilities	(1,169		)
Estimated fair value of net tangible assets acquired	486
Estimated fair value of identifiable intangible assets	15,134
Estimated goodwill	23,173
Estimated fair value of net assets acquired	38,793
Net purchase price	$	38,793

Business Acquisition, Pro Forma Information

The following tables summarize the supplemental statements of operations information on an unaudited pro forma basis as if the Carve-Out Business acquisition had occurred on July 1, 2015:



	Three Months ended March 31,		Nine Months ended March 31,
	2016		2016
Pro forma net revenues	$	90,023	$	258,519
Pro forma net income	$	4,081	$	11,161
Basic pro forma net earnings per share	$	0.11	$	0.29
Diluted pro forma net earnings per share	$	0.10	$	0.29

Fair Value of Financial Instruments (Tables)

9 Months Ended

Mar. 31, 2017

Fair Value Disclosures [Abstract]

Summary of Financial Assets Measured at Fair Value

The following table summarizes the Company’s financial assets measured at fair value on a recurring basis at March 31, 2017:



	Fair Value Measurements
	March 31, 2017		Level 1		Level 2		Level 3
Assets:
Certificates of deposit	$	100,057	$	—	$	100,057	$	—
Total	$	100,057	$	—	$	100,057	$	—

Inventory (Tables)

9 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Inventory

Inventory was comprised of the following:



	March 31, 2017		June 30, 2016
Raw materials	$	39,039	$	31,205
Work in process	22,964		15,967
Finished goods	10,093		11,112
Total	$	72,096	$	58,284

Goodwill (Tables)

9 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The following table sets forth the changes in the carrying amount of goodwill by reporting unit for the nine months ended March 31, 2017:



	MCE		MDS		Carve-Out Business			Total
Balance at June 30, 2016	$	134,378	$	39,406	$	170,243		$	344,027
Goodwill adjustment for the Carve-Out Business acquisition	—		—		(1,487		)	(1,487		)
Goodwill arising from the CES acquisition	23,173		—		—			23,173
Balance at March 31, 2017	$	157,551	$	39,406	$	168,756		$	365,713

Restructuring Plan (Tables)

9 Months Ended

Mar. 31, 2017

Restructuring and Related Activities [Abstract]

Expenses by Reportable Segment for Restructuring Plans

The following table presents the detail of activity for the Company’s restructuring plans:



	Severance & Related			Facilities & Other			Total
Restructuring liability at June 30, 2016	$	190		$	736		$	926
Restructuring and other charges	550			275			825
Cash paid	(384		)	(867		)	(1,251		)
Restructuring liability at March 31, 2017	$	356		$	144		$	500

Stock-Based Compensation (Tables)

9 Months Ended

Mar. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Stock Option Plans

The following table summarizes activity of the Company’s stock option plans since June 30, 2016:



	Options Outstanding
	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)
Outstanding at June 30, 2016	258		$	13.34	1.06
Granted	—		—
Exercised	(138	)	13.34
Canceled	—		—
Outstanding at March 31, 2017	120		$	13.34	0.56

Summary of Nonvested Restricted Stock

The following table summarizes the status of the Company’s non-vested restricted stock awards since June 30, 2016:



	Non-vested Restricted Stock Awards
	Number of Shares		Weighted Average Grant Date Fair Value
Outstanding at June 30, 2016	1,666		$	13.09
Granted	686		24.15
Vested	(711	)	11.46
Forfeited	(49	)	14.83
Outstanding at March 31, 2017	1,592		$	18.54

Stock Based Compensation Expenses

The following table presents share-based compensation expenses included in the Company’s consolidated statements of operations:



	Three Months Ended March 31,						Nine Months Ended March 31,
	2017			2016			2017			2016
Cost of revenues	$	150		$	152		$	373		$	307
Selling, general and administrative	3,270			1,802			9,848			5,993
Research and development	295			196			1,219			944
Share-based compensation expense before tax	3,715			2,150			11,440			7,244
Income taxes	(1,418		)	(805		)	(4,381		)	(2,838		)
Share-based compensation expense, net of income taxes	$	2,297		$	1,345		$	7,059		$	4,406

Operating Segment, Geographic Information and Significant Customers (Tables)

9 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Geographic Distribution of Revenues and Long Lived Assets from Continuing Operations

The geographic distribution of the Company’s revenues as determined by order origination based on the country in which the Company's legal subsidiary is domiciled is summarized as follows:



	U.S.		Europe		Asia Pacific		Eliminations			Total
THREE MONTHS ENDED MARCH 31, 2017
Net revenues to unaffiliated customers	$	98,599	$	8,085	$	633	$	—		$	107,317
Inter-geographic revenues	1,745		21		—		(1,766		)	—
Net revenues	$	100,344	$	8,106	$	633	$	(1,766	)	$	107,317
THREE MONTHS ENDED MARCH 31, 2016
Net revenues to unaffiliated customers	$	62,675	$	1,742	$	1,481	$	—		$	65,898
Inter-geographic revenues	1,598		18		—		(1,616		)	—
Net revenues	$	64,273	$	1,760	$	1,481	$	(1,616	)	$	65,898
NINE MONTHS ENDED MARCH 31, 2017
Net revenues to unaffiliated customers	$	273,054	$	14,747	$	5,179	$	—		$	292,980
Inter-geographic revenues	6,925		36		—		(6,961		)	—
Net revenues	$	279,979	$	14,783	$	5,179	$	(6,961	)	$	292,980
NINE MONTHS ENDED MARCH 31, 2016
Net revenues to unaffiliated customers	$	178,249	$	2,852	$	3,623	$	—		$	184,724
Inter-geographic revenues	4,800		420		—		(5,220		)	—
Net revenues	$	183,049	$	3,272	$	3,623	$	(5,220	)	$	184,724



	Three Months Ended March 31,				Nine Months Ended March 31,
	2017		2016		2017		2016
Domestic (1)	$	87,765	$	52,054	$	244,343	$	149,826
International/Foreign Military Sales (2)	19,552		13,844		48,637		34,898
Total Net Revenue	$	107,317	$	65,898	$	292,980	$	184,724

(1) Domestic revenues consist of sales where the end user is within the U.S., as well as sales to prime defense contractor customers where the ultimate end user location is not defined.

The following table below presents the Company's net revenue by end application for the periods presented:



	Three Months Ended March 31,				Nine Months Ended March 31,
	2017		2016		2017		2016
Radar (1)	$	33,017	$	39,207	$	115,308	$	103,925
Electronic Warfare (2)	35,920		17,915		78,204		51,136
Other (3)	38,380		8,776		99,468		29,663
Total Net Revenue	$	107,317	$	65,898	$	292,980	$	184,724

(1) Radar includes end-use applications where radio frequency signals are utilized to detect, track, and identify objects.

(2) Electronic Warfare includes end-use applications comprising the offensive and defensive use of the electromagnetic spectrum.

The following table below presents the Company's net revenue by product grouping for the periods presented:



	Three Months Ended March 31,				Nine Months Ended March 31,
	2017		2016		2017		2016
Components (1)	$	26,920	$	5,179	$	74,126	$	16,838
Modules and Sub-assemblies (2)	43,330		34,061		115,744		90,680
Integrated Subsystems (3)	37,067		26,658		103,110		77,206
Total Net Revenue	$	107,317	$	65,898	$	292,980	$	184,724

The geographic distribution of the Company’s long-lived assets is summarized as follows:



	U.S.		Europe		Asia Pacific		Eliminations		Total
March 31, 2017	$	45,890	$	1,448	$	18	$	—	$	47,356
June 30, 2016	$	28,187	$	127	$	23	$	—	$	28,337

Customers Comprising Ten Percent or More Revenues

Customers comprising 10% or more of the Company’s revenues for the periods shown below are as follows:



	Three Months Ended March 31,				Nine Months Ended March 31,
	2017		2016		2017		2016
Raytheon Company	14	%	17	%	17	%	28	%
Lockheed Martin Corporation	27	%	26	%	22	%	23	%
Northrop Grumman Corporation	*		14	%	*		*
	41	%	57	%	39	%	51	%

Schedules of Concentration of Risk, by Risk Factor

Programs comprising 10% or more of the Company’s revenues for the periods shown below are as follows:



	Three Months Ended March 31,				Nine Months Ended March 31,
	2017		2016		2017		2016
SEWIP	18	%	12	%	*		12	%
Patriot	*		*		*		11	%
	18	%	12	%	—	%	23	%


*	Indicates that the amount is less than 10% of the Company’s revenues for the respective period.

Description of Business (Details)	9 Months Ended
Description of Business (Details)	Mar. 31, 2017 program contractor
Accounting Policies [Abstract]
Number of programs using products and services \| program	300
Number of contractors using products and services \| contractor	25

Summary of Significant Accounting Policies - Reclassification (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax (benefit) expense	$ 3,170	$ 2,642	$ 3,690	$ 4,443
Cost of revenues	$ 56,534	34,496	$ 155,364	95,281
Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax (benefit) expense		169		(974)
Cost of revenues		$ (911)		$ (2,845)

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		9 Months Ended
	Feb. 01, 2017	May 02, 2016	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Jan. 26, 2017	Jun. 30, 2016
Significant Accounting Policies [Line Items]
Common stock, shares subscribed but unissued							6,000,000
Common stock, par value (usd per share)			$ 0.01		$ 0.01		$ 0.01	$ 0.01
Shares issued, price per share (usd per share)							$ 33.00
Multiple Delivery Revenue [Member]
Significant Accounting Policies [Line Items]
Percentage Of Revenue Recognized			37.00%	39.00%	32.00%	41.00%
Over-Allotment Option [Member]
Significant Accounting Policies [Line Items]
Common stock, shares subscribed but unissued							900,000
Number of shares issued in transaction	6,900,000
Shares issued in transaction	$ 215,732	$ 92,788

Summary of Significant Accounting Policies -Basic and Diluted Weighted Average Shares Outstanding (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Basic weighted-average shares outstanding (in shares)	43,773	33,251	40,573	33,052
Effect of dilutive equity instruments (in shares)	1,041	740	957	778
Diluted weighted-average shares outstanding (in shares)	44,814	33,991	41,530	33,830
Antidilutive securities excluded from computation of earnings per share (in shares)	9	26	13	4

Acquisitions - Narrative (Details) - USD ($)				1 Months Ended	3 Months Ended		9 Months Ended
Acquisitions - Narrative (Details) - USD ($)	Feb. 01, 2017	Nov. 04, 2016	May 02, 2016	Feb. 28, 2017	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016
Business Acquisition [Line Items]
Estimated fair value of goodwill					$ 365,713,000		$ 365,713,000		$ 344,027,000
Net purchase price							36,911,000	$ 9,756,000
CES Creative Electronic Systems S.A.
Business Acquisition [Line Items]
Total purchase price		$ 39,123,000
Cash paid at closing		39,123,000
Payments received related to a working capital adjustment		330,000
Estimated fair value of goodwill		23,173,000
Revenue of acquiree since acquisition date					6,367,000		10,323,000
Net income (loss) of acquiree since acquisition date					668,000		923,000
Net purchase price		38,793,000
Carve-Out Business
Business Acquisition [Line Items]
Total purchase price			$ 298,569,000
Cash paid at closing			300,000,000
Payments received related to a working capital adjustment			1,838,000	$ 1,838,000
Estimated fair value of goodwill			168,756,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount					27,166,000		27,166,000
Revenue of acquiree since acquisition date					25,870,000		76,108,000
Net income (loss) of acquiree since acquisition date					$ (284,000)		$ (4,197,000)
Pro forma net revenues						$ 90,023,000		258,519,000
Pro forma net income						$ 4,081,000		$ 11,161,000
Basic pro forma net earnings per share						$ 0.11		$ 0.29
Diluted pro forma net earnings per share						$ 0.10		$ 0.29
Developed Technology Rights [Member] \| CES Creative Electronic Systems S.A.
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired		$ 5,662,000
Useful life of acquired assets		7 years
Developed Technology Rights [Member] \| Carve-Out Business
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			29,700,000
Customer Relationships [Member] \| CES Creative Electronic Systems S.A.
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired		$ 9,472,000
Useful life of acquired assets		9 years
Customer Relationships [Member] \| Carve-Out Business
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			70,900,000
Backlog [Member] \| Carve-Out Business
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			2,200,000
Over-Allotment Option [Member]
Business Acquisition [Line Items]
Sale of Stock, Consideration Received on Transaction	$ 215,732,000		92,788,000
Secured Debt \| Term Loan A
Business Acquisition [Line Items]
Face amount			$ 200,000,000

Acquisitions - Net Purchase Price and Fair Values of Assets and Liabilities Acquired (Details) - USD ($) $ in Thousands			1 Months Ended	9 Months Ended
	Nov. 04, 2016	May 02, 2016	Feb. 28, 2017	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016
Consideration transferred
Net purchase price				$ 36,911	$ 9,756
Estimated fair value of tangible assets acquired and liabilities assumed
Estimated fair value of goodwill				$ 365,713		$ 344,027
CES Creative Electronic Systems S.A.
Consideration transferred
Cash paid at closing	$ 39,123
Working capital adjustment	(330)
Net purchase price	38,793
Estimated fair value of tangible assets acquired and liabilities assumed
Accounts receivable and cost in excess of billings	2,698
Inventory	7,262
Fixed assets	1,468
Current and non-current deferred tax assets	312
Other current and non-current assets	1,087
Current liabilities	(3,141)
Non-current liabilities	(8,031)
Non-current deferred tax liabilities	(1,169)
Estimated fair value of net tangible assets acquired	486
Estimated fair value of identifiable intangible assets	15,134
Estimated fair value of goodwill	23,173
Estimated fair value of assets acquired	38,793
Net purchase price	$ 39,123
Carve-Out Business
Consideration transferred
Cash paid at closing		$ 300,000
Value allocated to replacement awards		407
Working capital adjustment		(1,838)	$ (1,838)
Estimated fair value of tangible assets acquired and liabilities assumed
Accounts receivable and cost in excess of billings		17,157
Inventory		25,477
Fixed assets		13,996
Other current and non-current assets		524
Current liabilities		(4,692)
Non-current deferred tax liabilities		(25,449)
Estimated fair value of net tangible assets acquired		27,013
Estimated fair value of identifiable intangible assets		102,800
Estimated fair value of goodwill		168,756
Estimated fair value of assets acquired		298,569
Net purchase price		$ 298,569

Fair Value of Financial Instruments - Summary of Financial Assets Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring $ in Thousands	Mar. 31, 2017 USD ($)
Level 1
Assets:
Fair value measurement disclosure	$ 0
Level 2
Assets:
Fair value measurement disclosure	100,057
Level 3
Assets:
Fair value measurement disclosure	0
Certificates of Deposit \| Level 1
Assets:
Fair value measurement disclosure	0
Certificates of Deposit \| Level 2
Assets:
Fair value measurement disclosure	100,057
Certificates of Deposit \| Level 3
Assets:
Fair value measurement disclosure	0
Fair Value
Assets:
Fair value measurement disclosure	100,057
Fair Value \| Certificates of Deposit
Assets:
Fair value measurement disclosure	$ 100,057

Inventory (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Jun. 30, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 39,039	$ 31,205
Work in process	22,964	15,967
Finished goods	10,093	11,112
Total	$ 72,096	$ 58,284

Inventory - Additional Information (Detail)	9 Months Ended
Inventory - Additional Information (Detail)	Mar. 31, 2017 USD ($)
Schedule of Inventory [Line Items]
Increase (decrease) in inventories including assets acquired	$ 13,812,000
Production Cycle Term	Longer than one year
Product
Schedule of Inventory [Line Items]
Inventory relating to contracts having production cycles longer than one year	$ 0

Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	9 Months Ended
	Mar. 31, 2017 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 344,027
Ending Balance	365,713
MCE
Goodwill [Roll Forward]
Beginning Balance	134,378
Ending Balance	157,551
MDS
Goodwill [Roll Forward]
Beginning Balance	39,406
Ending Balance	39,406
Carve-Out Business
Goodwill [Roll Forward]
Beginning Balance	170,243
Goodwill, Other Changes	(1,487)
Ending Balance	168,756
CES Creative Electronic Systems S.A.
Goodwill [Roll Forward]
Goodwill, Acquired During Period	23,173
CES Creative Electronic Systems S.A. \| MCE
Goodwill [Roll Forward]
Goodwill, Acquired During Period	23,173
Carve-Out Business
Goodwill [Roll Forward]
Goodwill, Other Changes	(1,487)
Carve-Out Business \| Carve-Out Business
Goodwill [Roll Forward]
Goodwill, Other Changes	$ (1,487)

Restructuring Plan - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Other Income and Expenses [Abstract]
Restructuring expenses	$ 459	$ 409	$ 825	$ 968

Expenses by Reportable Segment for Restructuring Plans (Detail) $ in Thousands	9 Months Ended
	Mar. 31, 2017 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring liability at June 30, 2016	$ 926
Restructuring and other charges	825
Cash paid	(1,251)
Restructuring liability at March 31, 2017	500
Severance & Related
Restructuring Reserve [Roll Forward]
Restructuring liability at June 30, 2016	190
Restructuring and other charges	550
Cash paid	(384)
Restructuring liability at March 31, 2017	356
Facilities & Other
Restructuring Reserve [Roll Forward]
Restructuring liability at June 30, 2016	736
Restructuring and other charges	275
Cash paid	(867)
Restructuring liability at March 31, 2017	$ 144

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ 3,170	$ 2,642	$ 3,690	$ 4,443
(Loss) income from operations before income taxes	10,218	$ 6,999	19,761	$ 16,696
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	$ 757		$ 757

Debt - Additional Information (Detail) - USD ($)	Mar. 31, 2017	May 02, 2016
Debt Instrument [Line Items]
Long-term debt	$ 192,500,000
Amount of outstanding letter of credit	5,168,000
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 100,000,000
Term Loan
Debt Instrument [Line Items]
Debt issuance costs	$ 6,363,000
Stated interest rate	3.15%
Secured Debt \| Term Loan A
Debt Instrument [Line Items]
Face amount		$ 200,000,000

Stock Based Compensation - Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands	9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocation of recognized period costs, capitalized amount	$ 177	$ 114
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance under stock incentive plan (in shares)	1,800
Shares available for future grant (in shares)	348
Purchase price as a percentage of the lesser of the market value of such shares at either the beginning or the end of each nine-month offering period	85.00%
Percentage of employee compensation that may be uses to purchase common stock through payroll deductions, maximum	10.00%
Granted (in shares)	50	46
2005 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance under stock incentive plan (in shares)	15,252
Exercise price of stock option, percentage	100.00%
Shares available for future grant (in shares)	2,823
2005 Stock Incentive Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of stock option	7 years

Summary of Stock Option Plans (Detail) - Stock Options - $ / shares shares in Thousands	9 Months Ended	12 Months Ended
	Mar. 31, 2017	Jun. 30, 2016
Number of Shares
Outstanding at beginning of period (in shares)	258
Granted (in shares)	0
Exercised (in shares)	(138)
Cancelled (in shares)	0
Outstanding at end of period (in shares)	120	258
Weighted Average Exercise Price
Outstanding at beginning of period (usd per share)	$ 13.34
Granted (usd per share)	0.00
Exercised (usd per share)	13.34
Cancelled (usd per share)	0.00
Outstanding at end of period (usd per share)	$ 13.34	$ 13.34
Weighted Average Remaining Contractual Term (Years)
Outstanding at end of period	6 months 22 days	1 year 22 days

Summary of Nonvested Restricted Stock (Detail) - Restricted Stock shares in Thousands	9 Months Ended
	Mar. 31, 2017 $ / shares shares
Number of Shares
Beginning Balance (in shares) \| shares	1,666
Granted (in shares) \| shares	686
Vested (in shares) \| shares	(711)
Forfeited (in shares) \| shares	(49)
Ending Balance (in shares) \| shares	1,592
Weighted Average Grant Date Fair Value
Beginning Balance (usd per share) \| $ / shares	$ 13.09
Granted (usd per share) \| $ / shares	24.15
Vested (usd per share) \| $ / shares	11.46
Forfeited (usd per share) \| $ / shares	14.83
Ending Balance (usd per share) \| $ / shares	$ 18.54

Stock Based Compensation Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense before tax	$ 3,715	$ 2,150	$ 11,440	$ 7,244
Income taxes	(1,418)	(805)	(4,381)	(2,838)
Net compensation expense	2,297	1,345	7,059	4,406
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense before tax	150	152	373	307
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense before tax	3,270	1,802	9,848	5,993
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense before tax	$ 295	$ 196	$ 1,219	$ 944

Pension (Details) - Pension Plan - USD ($) $ in Thousands	5 Months Ended	9 Months Ended
Pension (Details) - Pension Plan - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2017	Nov. 04, 2016
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	$ 199
Fiscal 2017 cash contributions to plan		$ 330
Other Noncurrent Liabilities
Defined Benefit Plan Disclosure [Line Items]
Net funded status of plan			$ 7,658

Operating Segment, Geographic Information and Significant Customers - Geographic Distribution of Revenues and Long Lived Assets from Continuing Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 107,317	$ 65,898	$ 292,980	$ 184,724
Identifiable long-lived assets	47,356		47,356		$ 28,337
US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	98,599	62,675	273,054	178,249
Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	8,085	1,742	14,747	2,852
Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	633	1,481	5,179	3,623
Reportable Geographical Components \| US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	100,344	64,273	279,979	183,049
Identifiable long-lived assets	45,890		45,890		28,187
Reportable Geographical Components \| Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	8,106	1,760	14,783	3,272
Identifiable long-lived assets	1,448		1,448		127
Reportable Geographical Components \| Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	633	1,481	5,179	3,623
Identifiable long-lived assets	18		18		23
Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(1,766)	(1,616)	(6,961)	(5,220)
Identifiable long-lived assets	0		0		$ 0
Geography Eliminations \| US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(1,745)	(1,598)	(6,925)	(4,800)
Geography Eliminations \| Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(21)	(18)	(36)	(420)
Geography Eliminations \| Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	0	0	0	0
Domestic
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	87,765	52,054	244,343	149,826
International/Foreign Military Sales
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	19,552	13,844	48,637	34,898
Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	26,920	5,179	74,126	16,838
Modules and Sub-assemblies
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	43,330	34,061	115,744	90,680
Integrated Subsystems
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	37,067	26,658	103,110	77,206
Radar
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	33,017	39,207	115,308	103,925
Electronic Warfare
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	35,920	17,915	78,204	51,136
Other End Applications
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 38,380	$ 8,776	$ 99,468	$ 29,663

Operating Segment, Geographic Information and Significant Customers - Customers Comprising Ten Percent or more Revenues (Detail) - Sales Revenue, Net	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Revenue, Major Customer [Line Items]
Concentration risk, percentage	18.00%	12.00%	0.00%	23.00%
Customer Concentration Risk
Revenue, Major Customer [Line Items]
Concentration risk, percentage	41.00%	57.00%	39.00%	51.00%
Customer Concentration Risk \| Raytheon Company
Revenue, Major Customer [Line Items]
Concentration risk, percentage	14.00%	17.00%	17.00%	28.00%
Customer Concentration Risk \| Lockheed Martin Corporation
Revenue, Major Customer [Line Items]
Concentration risk, percentage	27.00%	26.00%	22.00%	23.00%
Customer Concentration Risk \| Northrop Grumman Corporation
Revenue, Major Customer [Line Items]
Concentration risk, percentage		14.00%

Operating Segment, Geographic Information and Significant Customers - Programs Comprising Ten Percent or more of Company's Revenue (Detail) - Sales Revenue, Net	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Concentration risk, percentage	18.00%	12.00%	0.00%	23.00%
SEWIP \| Program Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	18.00%	12.00%		12.00%
Patriot \| Program Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage				11.00%

Commitments And Contingencies - Additional Information (Detail) $ in Thousands	Mar. 31, 2017 USD ($)
Non-cancelable purchase commitments
Long-term Purchase Commitment [Line Items]
Purchase commitments for less than one year	$ 36,688

Subsequent Events (Narrative) (Details)	Apr. 03, 2017 USD ($)
Subsequent Event
Subsequent Event [Line Items]
Total purchase price	$ 40,500