Segment Reporting [Abstract] Summary of Performance of Operations by Reportable Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Reconciliation of Net Income (loss), Most Directly Comparable GAAP Financial Measure to Adjusted EBITDA Schedule Of Reconciliation Of Net Income [Table Text Block] Tabular disclosure of the reconciliation from the entity's net income or loss to its adjusted EBITDA. Adjusted EBITDA is defined as earnings from continuing operations before interest income and expense, income taxes, depreciation, amortization of acquired intangible assets, restructuring, impairment of long-lived assets, acquisition costs and other related expenses, fair value adjustments from purchase accounting and stock-based compensation costs. 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] 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] Award Type [Domain] Restricted Stock Restricted Stock [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, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning Balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending Balance 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 [Roll Forward] Beginning Balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Ending Balance 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] Employee Stock [Member] Employee Stock [Member] Stock Options Stock Options [Member] Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding at beginning of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Cancelled Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Outstanding at end of period Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Outstanding at beginning of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cancelled Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Outstanding at end of period 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 Fair Value Disclosures [Abstract] Summary of Financial Assets Measured at Fair Value Fair Value, Assets Measured on Recurring Basis [Table Text Block] Statement of Financial Position [Abstract] Accounts receivable, allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Micronetics Micronetics [Member] Micronetics [Member] Business Segments Business Segments [Axis] Segment [Domain] Segment [Domain] MCE Mercury Commercial Electronics [Member] Mercury Commercial Electronics [Member] MDS Mercury Defense Systems [Member] Mercury Defense Systems [Member] MIS Mercury Intelligence Systems [Member] Mercury Intelligence Systems [Member] Goodwill [Line Items] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill [Roll Forward] Beginning Balance Goodwill Goodwill adjustment for the Micronetics acquisition Goodwill, Period Increase (Decrease) Ending Balance Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Program One [Member] Program One [Member] Program One [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Percent of company revenue Concentration Risk, Percentage 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 Schedule of Inventory [Table] Schedule Of Inventory [Table] Schedule of Inventory [Table] Products and Services Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Product Product [Member] Schedule of Inventory [Line Items] Schedule Of Inventory [Line Items] Schedule of Inventory [Line Items] Increase in Inventory Increase (Decrease) in Inventories Inventory relating to contracts having production cycles longer than one year Inventory for Long-term Contracts or Programs, Gross Production Cycle Term Operating Cycle Changes in Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Earnings Per Share [Abstract] Basic weighted-average shares outstanding Weighted Average Number of Shares Outstanding, Basic Effect of dilutive equity instruments Weighted Average Number Diluted Shares Outstanding Adjustment Diluted weighted-average shares outstanding Weighted Average Number of Shares Outstanding, Diluted Debt Disclosure [Abstract] Debt Debt Disclosure [Text Block] Other Income and Expenses [Abstract] Component of Other Operating Cost and Expense [Table] Component of Other Operating Cost and Expense [Table] MCE Scenario Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Severance Severance [Member] Severance [Member] Facilities And Other Facilities And Other [Member] Facilities And Other [Member] Component of Operating Other Cost and Expense [Line Items] Component of Operating Other Cost and Expense [Line Items] Restructuring, Settlement and Impairment Provisions Restructuring, Settlement and Impairment Provisions Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Restructuring liability at beginning of period Restructuring Reserve, Current Cash paid Payments for Restructuring Reversals Restructuring Expense Reversal Reversal of unused restructuring accrual. Restructuring liability at end of period Income Statement [Abstract] Net revenues Revenues 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 Restructuring Charges Acquisition costs and other related expenses Business Combination, Acquisition Related Costs Total operating expenses Operating Expenses Loss from operations Operating Income (Loss) Interest income Investment Income, Interest Interest expense Interest Expense Other income, net Other Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Tax benefit Income Tax Expense (Benefit) Net loss Net Income (Loss) Attributable to Parent Basic net loss per share: (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Diluted net loss per share: (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share 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 loss: Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Net loss Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Total comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Reconciliation of Revenue from Segments to Consolidated [Table] Reconciliation of Revenue from Segments to Consolidated [Table] Geographical Geographical [Axis] Segment, Geographical [Domain] Segment, Geographical [Domain] US UNITED STATES Europe Europe [Member] Europe [Member] Asia Pacific Asia Pacific [Member] Asia Pacific [Member] Eliminations Geographical Intersegment, Eliminations [Member] Segment Reporting, Revenue Reconciling Item [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Net revenues to unaffiliated customers Entity Wide Disclosure On Geographic Areas Revenue From External Customers Attributed To Individual Foreign Countries Disclosure of material amounts of revenues from external customers by individual foreign country. In addition, an entity may provide subtotals of geographic information for specified groups of countries. Inter-geographic revenues Revenues From Transactions With Other Geographic Locations Of Same Entity Amount of revenue from transactions with other geographic locations of the same entity. Net revenues Identifiable long-lived assets Disclosure on Geographic Areas, Long-Lived Assets in Entity's Country of Domicile Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Range Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Percent of company revenue Percentage Of Company Revenue Percentage of Company Revenue Interest expense, net Interest Income (Expense), Net Depreciation Depreciation Amortization of intangible assets Amortization of Acquired Intangible Assets Fair value adjustments from purchase accounting Fair Value Adjustments From Purchase Accounting Adjustments to the statement of operations as a result of fair value adjustment to assets and liabilities derived in a business combination. Stock-based compensation expense Share-based Compensation Adjusted EBITDA Adjusted Earnings Before Interest Taxes Depreciation And Amortization Tabular disclosure of adjusted EBITDA. Adjusted EBITDA is defined as earnings from continuing operations before interest income and expense, income taxes, depreciation, amortization of acquired intangible assets, restructuring, impairment of long-lived assets, acquisition costs and other related expenses, fair value adjustments from purchase accounting and stock-based compensation costs. Minimum Minimum [Member] Shares authorized for issuance under stock incentive plan 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 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 Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net loss Adjustments to reconcile net loss to net cash provided by (used in) 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 Provision (benefit) for deferred income taxes Deferred Income Tax Expense (Benefit) Excess tax benefit from stock-based compensation Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Operating Activities 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 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 (used in) 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 businesses, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Increase in 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 Excess tax benefits from stock-based compensation Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities Payments of deferred financing and offering costs Payments of Stock Issuance Costs Payments of acquired debt Payments to Acquire Available-for-sale Securities, Debt Decrease in restricted cash Proceeds from (Repayments of) Restricted Cash, Financing Activities Payments of capital lease obligations Repayments of Debt and Capital Lease Obligations Net cash provided by (used in) 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 (decrease) 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 Carrying Value Cash and cash equivalents at end of period Cash paid (received) during the period for: Supplemental Cash Flow Information [Abstract] Interest Interest Paid Income taxes Income Taxes Paid, Net Supplemental disclosures-non-cash activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Issuance of restricted stock awards to employees Stock Issued Capital lease Capital Lease Obligations Incurred Share-based business combination consideration Fair Value Of Unvested Stock Options Assumed Fair Value Of Unvested Stock Options Assumed Accounting Policies [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Weighted-Average Shares Earnings Per Share, Policy [Policy Text Block] Commitments and Contingencies Disclosure [Abstract] 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 Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable, net of allowance for doubtful accounts of $3 and $33 at December 31, 2013 and June 30, 2013, respectively Accounts Receivable, Net, Current Unbilled receivables and costs in excess of billings Costs in Excess of Billings on Uncompleted Contracts or Programs Expected to be Collected within One Year Inventory Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Prepaid income taxes Prepaid Taxes Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Property and equipment, net Property, Plant and Equipment, Net 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 gain on sale-leaseback Sale Leaseback Transaction, Deferred Gain, Net Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Income taxes payable Accrued Income Taxes, Noncurrent Other non-current liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note H) 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; 31,123,090 and 30,381,254 shares issued and outstanding at December 31, 2013 and June 30, 2013, 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 Operating Segment, Geographic Information and Significant Customers Segment Reporting Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Number of Operating Segments Number of Operating Segments 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 Arrangement Type [Domain] Multiple Delivery Revenue [Member] Multiple Delivery Revenue [Member] Multiple Delivery Revenue [Member] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Percentage Of Revenue Recognized Percentage Of Revenue Recognized Percentage of total revenue recognized under multiple-deliverable arrangements during the reporting periods. Common stock excluded from diluted earning per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Inventory Schedule of Inventory, Current [Table Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Senior Unsecured Credit Facilities Senior Unsecured Credit Facilities [Member] Senior Unsecured Credit Facilities [Member] Acquisition Covenants Acquisition Covenants [Member] Acquisition Covenants [Member] Credit Facility Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] KeyBank National Association Key Bank Credit Facility [Member] Key Bank Credit Facility [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Debt instrument borrowing period Debt Instrument Borrowing Period Debt Instrument Borrowing Period Credit Agreement accordion feature, incremental revolver or term loan amount Line Of Credit Facility, Permits Additional Borrowings Accordion Feature Line Of Credit Facility, Permits Additional Borrowings Accordion Feature Leverage Ratio Leverage Ratio Leverage Ratio Interest Coverage Ratio Interest Coverage Ratio Interest Coverage Ratio Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Borrowings outstanding Line of Credit Facility, Amount Outstanding Amount of outstanding letter of credit Letters of Credit Outstanding, Amount Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Inventory Inventory Disclosure [Text Block] Restructuring and Related Activities [Abstract] Expenses by Reportable Segment for Restructuring Plans Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Basic and Diluted Weighted Average Shares Outstanding Schedule of Weighted Average Number of Shares [Table Text Block] Major Customers Major Customers [Axis] Name of Major Customer [Domain] Name of Major Customer [Domain] Northrop Grumman Corporation Customer One [Member] Customer 1 [Member] Raytheon Company Customer Two [Member] Customer 2 [Member] Lockheed Martin Corporation Customer Three [Member] Customer 3 [Member] Revenue from Customers Entity-Wide Revenue, Major Customer, Percentage Restructuring Plan Restructuring and Related Activities Disclosure [Text Block] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [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 Income taxes Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Net compensation expense Allocated Share-based Compensation Expense, Net of Tax Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, Disclosure Item Amounts [Domain] Fair Value, Disclosure Item Amounts [Domain] U.S. Treasury bills and money market funds US Treasury Bill Securities [Member] Operating cash Operating Cash [Member] Operating Cash [Member] Restricted cash Restricted Cash [Member] Restricted Cash [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [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 Mercury Defense and Intelligence Systems Mercury Defense And Intelligence Systems [Member] Mercury Defense and Intelligence Systems [Member] Eliminations Intersegment Elimination [Member] Statement Segment Reporting [Axis] Statement Segment Reporting [Axis] Statement Segment Reporting [Axis] Statement Segment Reporting [Domain] Statement Segment Reporting [Domain] Statement Segment Reporting [Domain] Reportable Segment Reportable Segment [Member] Net revenues to unaffiliated customers Revenue from External Customers Intersegment revenues Segment Reporting Information, Intersegment Revenue Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Goodwill Goodwill Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Forecast [Member] Scenario, Forecast [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Number of positions eliminated Restructuring and Related Cost, Number of Positions Eliminated Subsequent Events Subsequent Events [Text Block] Document Documentand Entity Information [Abstract] Document Documentand Entity Information [Abstract] Entities [Table] Entities [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Document Information [Line Items] Document Information [Line Items] 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 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 contractors using products and services Nature of Business, Number of Contractors Using Products and Services Nature of Business, Number of Contractors Using Products and Services Income tax (benefit) expense (Loss) income from operations before income taxes Immaterial Error Correction Immaterial Error Correction Estimated changes in unrecognized tax benefits Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit 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] Description of Business Nature of Operations [Text Block]