Inventory Disclosure [Abstract] Raw materials Inventory, Raw Materials, Net of Reserves Work in process Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Total Inventory, Net Debt Disclosure [Abstract] Debt Debt Disclosure [Text Block] Inventory Schedule of Inventory, Current [Table Text Block] Statement of Financial Position [Abstract] Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable, net of allowance for doubtful accounts of $52 and $83 at March 31, 2018 and June 30, 2017, respectively Accounts Receivable, Net, Current Unbilled receivables and costs in excess of billings Costs in Excess of Billings, Current Inventory Prepaid income taxes Prepaid Taxes Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Estimated fair value of goodwill Goodwill Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Other non-current assets Other Assets, Noncurrent Total assets Assets Liabilities and Shareholders' Equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued expenses Accrued Liabilities, Current Accrued compensation Employee-related Liabilities, Current Deferred revenues and customer advances Deferred Revenue, Current Total current liabilities Liabilities, Current Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Income taxes payable Accrued Income Taxes, Noncurrent Long-term debt Secured Long-term Debt, Noncurrent Other non-current liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note M) Commitments and Contingencies Shareholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value; 1,000,000 shares authorized; no shares issued or outstanding Preferred Stock, Value, Issued Common stock, $0.01 par value; 85,000,000 shares authorized; 46,840,575 and 46,303,075 shares issued and outstanding at March 31, 2018 and June 30, 2017, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders' equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders' equity Liabilities and Equity Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Term Loan Term Loan [Member] Term Loan [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Debt instrument term Debt Instrument, Term Debt issuance costs Debt Issuance Costs, Gross Proceeds from lines of credit Proceeds from Lines of Credit Interest expense Interest Expense Amount of outstanding letter of credit Letters of Credit Outstanding, Amount Restructuring and Related Activities [Abstract] Restructuring Restructuring and Related Activities Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type Award Type [Axis] Award Type [Domain] Equity Award [Domain] Stock Options Employee Stock Option [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding at beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Outstanding at end of period (in shares) Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding at beginning of period (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cancelled (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Outstanding at end of period (usd per share) Weighted Average Remaining Contractual Term (Years) Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Remaining Contractual Term [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Term [Abstract] Outstanding at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Segment Reporting [Abstract] Operating Segment, Geographic Information and Significant Customers Segment Reporting Disclosure [Text Block] Earnings Per Share [Abstract] Basic weighted-average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Effect of dilutive equity instruments (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Diluted weighted-average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Themis Computer Acquisition Themis Computer Acquisition [Member] Themis Computer Acquisition [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Pro forma net revenues Business Acquisition, Pro Forma Revenue Pro forma net income Business Acquisition, Pro Forma Net Income (Loss) Basic pro forma net earnings per share (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Basic Diluted pro forma net earnings per share (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Diluted Accounting Policies [Abstract] Description of Business Nature of Operations [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] CES Creative Electronic Systems S.A. CES Creative Electronic Systems S.A. [Member] CES Creative Electronic Systems S.A. [Member] Delta Delta Microwave, LLC [Member] Delta Microwave, LLC [Member] RTL Richland Technologies, LLC [Member] Richland Technologies, LLC [Member] Themis Business Segments Segments [Axis] Segment [Domain] Segments [Domain] SMP Sensor And Mission Processing [Member] Sensor And Mission Processing [Member] AMS Advanced Microelectronic Solutions [Member] Advanced Microelectronic Solutions [Member] MDS Carve-Out Business [Member] Carve-Out Business [Member] Mercury Defense Systems [Member] Mercury Defense Systems [Member] Mercury Defense Systems [Member] Goodwill [Line Items] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill [Roll Forward] Beginning Balance Goodwill arising from the RTL acquisition Goodwill, Acquired During Period Ending Balance Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue, Net Sales Revenue, Net [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Lockheed Martin Corporation Raytheon Company [Member] Raytheon Company [Member] Lockheed Martin Corporation [Member] Lockheed Martin Corporation [Member] Lockheed Martin Corporation [Member] Northrop Grumman Corporation Northrop Grumman Corporation [Member] Northrop Grumman Corporation [Member] Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Concentration risk, percentage Concentration Risk, Percentage Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Business Acquisition [Axis] Consideration transferred Business Combination, Consideration Transferred [Abstract] Cash paid at closing Payments to Acquire Businesses, Gross Working capital adjustment Business Combinations, Consideration Received, Working Capital Adjustment Business Combinations, Consideration Received, Working Capital Adjustment Cash Acquired from Acquisition Cash Acquired from Acquisition Net purchase price Payments to Acquire Businesses, Net of Cash Acquired Estimated fair value of tangible assets acquired and liabilities assumed Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Accounts receivable and cost in excess of billings Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Inventory Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Fixed assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Other current and non-current assets Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets, Current And Noncurrent Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets, Current And Noncurrent Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Accrued expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Accrued Liabilities Other current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Non-current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities Deferred tax liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Fair value of net tangible assets acquired Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Tangible Assets Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Tangible Assets Fair value of identifiable intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Estimated fair value of assets acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Number of operating segments Number of Operating Segments Reconciliation of Revenue from Segments to Consolidated [Table] Reconciliation of Revenue from Segments to Consolidated [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Reportable Geographical Components Reportable Geographical Components [Member] Geography Eliminations Geography Eliminations [Member] Geographical Geographical [Axis] Segment, Geographical [Domain] Geographical [Domain] US UNITED STATES Europe Europe [Member] Asia Pacific Asia Pacific [Member] Geographic Distribution [Axis] Geographic Distribution [Axis] Geographic Distribution [Domain] Geographic Distribution [Domain] Domestic Geographic Distribution, Domestic [Member] International/Foreign Military Sales Geographic Distribution, Foreign [Member] End Application [Axis] End Application [Axis] End Application [Axis] End Application [Domain] End Applications [Domain] [Domain] for End Applications [Axis] Total Sensor & Effector Total Sensor And Effector Applications [Member] Total Sensor And Effector Applications [Member] Radar Radar [Member] Radar [Member] Electronic Warfare Electronic Warfare [Member] Electronic Warfare [Member] Other Sensor & Effector Other Sensor And Effector Applications [Member] Other Sensor And Effector Applications [Member] C4I C4I Applications [Member] C4I Applications [Member] Other End Applications Other End Applications [Member] Other End Applications [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Components Components [Member] Components [Member] Modules and Sub-assemblies Modules and Sub-assemblies [Member] Modules and Sub-assemblies [Member] Integrated Subsystems Integrated Subsystems [Member] Integrated Subsystems [Member] Segment Reporting, Revenue Reconciling Item [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Net revenues Revenues Identifiable long-lived assets Long-Lived Assets Expenses by Reportable Segment for Restructuring Plans Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Income Statement Location [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Income Statement Location [Domain] Cost of revenues Cost of Sales [Member] Selling, general and administrative Selling, General and Administrative Expenses [Member] Research and development Research and Development Expense [Member] Share-based compensation expense before tax Allocated Share-based Compensation Expense Income taxes Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Net compensation expense Allocated Share-based Compensation Expense, Net of Tax Federal statutory rate, blended rate for next fiscal year Tax Cuts And Jobs Act Of 2017, Federal Statutory Rate, Blended Rate For Next Fiscal Year Tax Cuts And Jobs Act Of 2017, Federal Statutory Rate, Blended Rate For Next Fiscal Year Federal statutory rate in periods subsequent to next fiscal year Tax Cuts And Jobs Act Of 2017, Federal Statutory Rate, Blended Rate For Years Subsequent To Next Fiscal Year Tax Cuts And Jobs Act Of 2017, Federal Statutory Rate, Blended Rate For Years Subsequent To Next Fiscal Year Deferred tax assets, effect of Tax Cuts and Jobs Act, tax expense (benefit) Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Deferred Tax Asset, Income Tax Expense (Benefit) Amount of income tax expense (benefit) for remeasurement of deferred tax asset from change in tax rate pursuant to Tax Cuts and Jobs Act of 2017. Provisional tax expense for foreign tax credits Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit) Amount of reasonable estimate for income tax expense (benefit) from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act of 2017 for which accounting for tax effect is incomplete. Income tax (benefit) expense Income Tax Expense (Benefit) (Loss) income from operations before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Excess tax benefits on stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Operating loss carryforward, increase in carrying value Operating Loss Carryforward, Increase In Carrying Value Operating Loss Carryforward, Increase In Carrying Value Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Certificates of deposit Certificates of Deposit [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets: Assets, Fair Value Disclosure [Abstract] Fair value measurement disclosure Assets, Fair Value Disclosure Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Program Concentration Risk Program Concentration Risk [Member] Program Concentration Risk [Member] SEWIP SEWIP Program [Member] SEWIP Program [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Schedule of the Net Purchase Price and Fair Values of Assets and Liabilities Acquired Schedule of Business Acquisitions, by Acquisition [Table Text Block] Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Long-term Purchase Commitment [Table] Long-term Purchase Commitment [Table] Category of Item Purchased Category of Item Purchased [Axis] Long-term Purchase Commitment, Category of Item Purchased [Domain] Long-term Purchase Commitment, Category of Item Purchased [Domain] Non-cancelable purchase commitments Non Cancelable Purchase Commitments [Member] Non Cancelable Purchase Commitments [Member] Long-term Purchase Commitment [Line Items] Long-term Purchase Commitment [Line Items] Purchase commitments for less than one year Purchase Commitment, Remaining Minimum Amount Committed Summary of Financial Assets Measured at Fair Value Fair Value, Assets Measured on Recurring Basis [Table Text Block] Other Income and Expenses [Abstract] Restructuring expenses Restructuring Charges Number of programs using products and services Nature of Business, Number of Programs Using Products and Services Nature of Business, Number of Programs Using Products and Services Number of defense prime contractors using products and services Nature of Business, Number of Defense Prime Contractors Using Products and Services Nature of Business, Number of Defense Prime Contractors Using Products and Services Goodwill Goodwill Disclosure [Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Accounts receivable, allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Preferred stock, par value (usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (shares) Preferred Stock, Shares Outstanding Common stock, par value (usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (shares) Common Stock, Shares Authorized Common Stock, Shares, Issued (shares) Common Stock, Shares, Issued Common stock, shares outstanding (shares) Common Stock, Shares, Outstanding Basic and Diluted Weighted Average Shares Outstanding Schedule of Weighted Average Number of Shares [Table Text Block] Acquisitions Business Combination Disclosure [Text Block] Inventory Inventory Disclosure [Text Block] Compensation and Retirement Disclosure [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Pension Plan Pension Plan [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Noncurrent Liabilities Other Noncurrent Liabilities [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Net funded status of plan Defined Benefit Plan, Amounts Recognized in Balance Sheet Pension benefit plan, net of tax Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost Fiscal 2017 cash contributions to plan Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year Employee Benefit Plan Pension and Other Postretirement Benefits Disclosure [Text Block] Restricted Stock Restricted Stock [Member] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning Balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending Balance (in shares) Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Beginning Balance (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Ending Balance (usd per share) Schedule of Inventory [Table] Schedule Of Inventory [Table] Schedule of Inventory [Table] Product Product [Member] Schedule of Inventory [Line Items] Schedule Of Inventory [Line Items] Schedule of Inventory [Line Items] Inventory relating to contracts having production cycles longer than one year Inventory for Long-term Contracts or Programs, Gross Production cycle term (in years) Operating Cycle Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Net Income (Loss) Attributable to Parent Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization expense Depreciation, Depletion and Amortization Stock-based compensation expense Share-based Compensation Benefit for deferred income taxes Deferred Income Tax Expense (Benefit) Non-cash interest expense Paid-in-Kind Interest Other non-cash items Other Noncash Income (Expense) Changes in operating assets and liabilities, net of effects of businesses acquired: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, unbilled receivable, and cost in excess of billings Increase (Decrease) in Accounts Receivable Inventory Increase (Decrease) in Inventories Prepaid income taxes Increase (Decrease) in Prepaid Taxes Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense Other non-current assets Increase (Decrease) in Other Noncurrent Assets Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred revenues and customer advances Increase (Decrease) in Deferred Revenue and Customer Advances and Deposits Income taxes payable Increase (Decrease) in Income Taxes Payable Other non-current liabilities Increase (Decrease) in Other Noncurrent Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Acquisition of business, net of cash acquired Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Other investing activities Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from employee stock plans Proceeds from Stock Options Exercised Payments for retirement of common stock Payments for Repurchase of Common Stock Payments under credit facilities Repayments of Long-term Lines of Credit Borrowings under credit facilities Proceeds from Long-term Lines of Credit Proceeds from equity offering, net Proceeds from Other Equity Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash paid during the period for: Supplemental Cash Flow Information [Abstract] Interest Interest Paid Income taxes Income Taxes Paid, Net Document Documentand Entity Information [Abstract] Document Documentand Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Deferred Revenue Arrangement Type [Axis] Deferred Revenue Arrangement Type [Axis] Deferred Revenue Arrangement Type [Domain] Deferred Revenue [Domain] Ship and bill Ship and Bill [Member] Ship and Bill [Member] Multiple deliverable Multiple Delivery Revenue [Member] Multiple Delivery Revenue [Member] Contract accounting Contract Accounting [Member] Contract Accounting [Member] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Number of accounting methods for revenue recognition Revenue Recognition, Number Of Accounting Methods Revenue Recognition, Number Of Accounting Methods Purchase agreement, maximum receivable balances Accounts Receivable, Purchase Agreement, Maximum Receivable Balances Accounts Receivable, Purchase Agreement, Maximum Receivable Balances Factored accounts receivable Accounts Receivable, Factored Accounts Receivable, Factored Accounts receivable factoring fees Accounts Receivable, Factoring Fees Accounts Receivable, Factoring Fees Percentage of revenue recognized Percentage Of Revenue Recognized Percentage of total revenue recognized under multiple-deliverable arrangements during the reporting periods. Income Statement [Abstract] Cost of revenues Cost of Revenue Gross margin Gross Profit Operating expenses: Operating Expenses [Abstract] Selling, general and administrative Selling, General and Administrative Expense Research and development Research and Development Expense Amortization of intangible assets Amortization of Intangible Assets Restructuring and other charges Acquisition costs and other related expenses Business Combination, Acquisition Related Costs Total operating expenses Operating Expenses Income from operations Operating Income (Loss) Interest income Investment Income, Interest Interest expense Other income, net Other Nonoperating Income (Expense) Income before income taxes Tax provision (benefit) Net income Basic net earnings per share (in dollars per share) Earnings Per Share, Basic Diluted net earnings per share (in dollars per share) Earnings Per Share, Diluted Weighted-average shares outstanding: Weighted Average Number Basic And Diluted Shares Outstanding [Abstract] Weighted Average Number Basic And Diluted, Shares Outstanding [Abstract] Basic (in shares) Diluted (in shares) Comprehensive income: Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Net income Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Total other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Summary of Stock Option Plans Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of Nonvested Restricted Stock Schedule of Nonvested Share Activity [Table Text Block] Stock Based Compensation Expenses Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Changes in Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Business Combinations Business Combinations Policy [Policy Text Block] Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Accounts Receivable Factoring Receivables, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Weighted-Average Shares Earnings Per Share, Policy [Policy Text Block] Plan Name Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2005 Stock Incentive Plan Stock Option Plan Twenty Zero Five [Member] Stock Option Plan, Twenty Zero Five [Member] Range Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Employee Stock Employee Stock [Member] Shares authorized for issuance under stock incentive plan (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Exercise price of stock option, percentage Minimum Grant Date Fair Value Of Nonqualified Stock Options As Percentage Of Fair Value Of Common Stock Minimum Grant Date Fair Value Of Nonqualified Stock Options As Percentage Of Fair Value Of Common Stock Term of stock option Share Based Compensation Arrangement By Share Based Payment Award Contractual Life Maximum number of years for the company's stock options before they expire. Shares available for future grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 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 Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date Percentage of employee compensation that may be uses to purchase common stock through payroll deductions, maximum Employee Stock Purchase Plan Maximum Percentage Of Compensation To Purchase Shares By Eligible Participants Employee Stock Purchase Plan, Maximum Percentage of Compensation to Purchase Shares By Eligible Participants Allocation of recognized period costs, capitalized amount Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Geographic Distribution of Revenues and Long Lived Assets from Continuing Operations Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Customers Comprising Ten Percent or More Revenues Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Schedules of Concentration of Risk, by Risk Factor Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships Customer Relationships [Member] Developed Technology Rights Developed Technology Rights [Member] Backlog Order or Production Backlog [Member] Acquisition of business, net of cash acquired Total purchase price Business Combination, Consideration Transferred Finite-lived Intangible Assets Acquired Finite-lived Intangible Assets Acquired Useful life of acquired assets Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Tax deductible goodwill Business Acquisition, Goodwill, Expected Tax Deductible Amount Revenue of acquiree since acquisition date Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Net income (loss) of acquiree since acquisition date Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Type Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Severance & Related Employee Severance [Member] Facilities & Other Facility Closing [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Restructuring liability at June 30, 2017 Restructuring Reserve, Current Restructuring and other charges Restructuring, Settlement and Impairment Provisions Cash paid Payments for Restructuring Restructuring liability at March 31, 2018