Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts and Other Receivables, Net, Current Accounts receivable, net Accounts Payable, Current Accounts payable Accrued Income Taxes, Current Income taxes payable Accrued Income Taxes, Noncurrent Noncurrent income tax liabilities Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less accumulated depreciation and amortization Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Accumulated net adjustments related to postretirement benefits Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accumulated net currency translation adjustments Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Total accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income (Loss) [Member] Additional Paid in Capital, Common Stock Paid-in capital Additional Paid-in Capital [Member] Paid-in Capital [Member] Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Share-based compensation expense Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided by operating activities: Advertising Costs, Policy [Policy Text Block] Advertising Costs Allocated Share-based Compensation Expense, Net of Tax Total share-based compensation, net of tax Allowance for Doubtful Accounts [Member] Allowance for Doubtful Accounts [Member] Allowance for Doubtful Accounts Receivable, Current Net of allowance for doubtful accounts Alternative Investments [Member] Alternative Investments [Member] Alternative Investments [Member] Amendment Flag Amendment Flag Amortization of Intangible Assets Amortization expense related to purchased intangible assets Intangible amortization Amount Includes from Acquisition and Foreign Currency Impact Amount Includes from Acquisition and Foreign Currency Impact Amount included from Ismeca Acquisition and foreign currency impact Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of common stock shares excluded from computation of diluted income per share Assets Total consolidated assets Total consolidated assets Assets [Abstract] ASSETS Assets, Current Total current assets Assets, Current [Abstract] Current assets: Assets Of Companys Reportable Segments [Abstract] Assets Of Companys Reportable Segments [Abstract] Total assets by segment: Assets of Disposal Group, Including Discontinued Operation Discontinued operations Total assets Assets of Disposal Group, Including Discontinued Operation [Abstract] Assets: Assets of Disposal Group, Including Discontinued Operation, Current Current assets of discontinued video camera segment Total current assets Available-for-sale Securities Total estimated fair value Available-for-sale Securities, Amortized Cost Basis Amortized Cost Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] Available-for-sale Securities, Current Short-term investments Estimated Fair Value Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due in one year or less, Amortized Cost Securities amortized cost, Due in one year or less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due in one year or less, Estimated Fair Value Securities fair value, Due in one year or less Amount of accumulated pre-tax unrealized gain before deducting pre-tax unrealized losses on investments in available-for-sale securities impacting investments. Available For Sale Securities, Gross Unrealized Gain Accumulated In Investments Gross Unrealized Gains Amount of accumulated pre-tax unrealized loss before deducting pre-tax unrealized gain on investments in available-for-sale securities impacting investments. Available For Sale Securities Gross Unrealized Loss Accumulated In Investments Gross Unrealized Losses Available-for-sale Securities [Table Text Block] Short-Term Investments by Security Type Award Type [Axis] Award Type [Axis] Basis of Presentation and Significant Accounting Policies [Text Block] Basis of Presentation Benefit Obligation [Member] Benefit Obligation [Member] Projected Benefit Obligation [Member] Broadcast Microwave Services. Broadcast Microwave Services [Member] Broadcast Microwave Services [Member] Building Improvements [Member] Building Improvements [Member] Building [Member] Buildings [Member] Buildings and Improvements, Gross Buildings and building improvements Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business acquisition contingent consideration receivable at fair value. Business Acquisition Contingent Consideration Receivable At Fair Value Contingent consideration from sale of video camera segment Business Acquisition [Line Items] Business Acquisition [Line Items] Business Combination, Consideration Transferred Purchase price of acquisition, cash reserves Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Asset Fair value adjustment of contingent consideration Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Purchase price of acquisition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Purchase price of acquisition, liabilities assumed Business Combinations [Abstract] Business Combinations [Abstract] Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of year Cash and cash equivalents at beginning of year Cash and cash equivalents Cash and Cash Equivalents Disclosure [Text Block] Cash, Cash Equivalents and Short-term Investments Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Cash, Cash Equivalents and Short-term Investments Cash [Member] Cash [Member] Cash Provided by (Used in) Investing Activities, Discontinued Operations Investing cash flows of discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Operating cash flows of discontinued operations Cash Surrender Value of Life Insurance Cash surrender value of the related life insurance policies Certificates of Deposit [Member] Bank Certificates of Deposit [Member] SWITZERLAND Switzerland [Member] Change In Plan Assets [Member] Change In Plan Assets [Member] Change in Plan Assets [Member] Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block] Schedule of Benefit Obligation, Fair Value of Plan Assets, Funded Status and Liability of Swiss Plan Class of Stock [Domain] Class of Stock [Domain] Class of Stock [Line Items] Class of Stock [Line Items] Class of Warrant or Right, Date from which Warrants or Rights Exercisable Stockholder Rights Plan, expiration date Class of Warrant or Right, Exercise Price of Warrants or Rights Preferred Stock purchase price upon exercise of Rights CHINA China [Member] Collection Term Range Collection Term Range Time period for assessment and collection of income taxes Commitments and Contingencies Commitments and contingencies Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies, Policy [Policy Text Block] Contingencies and Litigation Commitments Contingencies and Guarantees [Text Block] Guarantees Common Stock, Dividends, Per Share, Declared Cash dividend, per share Common Stock [Member] Common Stock $1 Par Value [Member] Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Common Stock, Value, Issued Common stock, $1 par value; 60,000 shares authorized, 25,692 shares issued and outstanding in 2014 and 25,080 shares in 2013 Compensation and Employee Benefit Plans [Text Block] Employee Benefit Plans Compensation and Retirement Disclosure [Abstract] Compensation and Retirement Disclosure [Abstract] Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive loss Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Comprehensive Income (Loss) Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration of Credit Risk Concentration Risk, Percentage Net sales percentage Concentration Risk Type [Domain] Concentration Risk Type [Domain] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Corporate, Non-Segment [Member] Corporate, Non-Segment [Member] Cost of Goods and Services Sold Cost of sales Cost of Sales [Member] Cost of Sales [Member] Costs and Expenses Total cost and expenses Costs and Expenses [Abstract] Cost and expenses: COSTA RICA Costa Rica [Member] Current Federal Tax Expense (Benefit) U.S. Federal Current Fiscal Year End Date Current Fiscal Year End Date Current Foreign Tax Expense (Benefit) Foreign Current Income Tax Expense (Benefit) Total current Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Current: Current State and Local Tax Expense (Benefit) U.S. State Customer Concentration Risk [Member] Customer Concentration Risk [Member] GERMANY Germany [Member] Debt Securities [Member] Debt Securities [Member] Debt Security [Axis] Debt Security [Axis] Deferred Compensation Liability, Current Payroll liability in accrued compensation and benefits Deferred Federal Income Tax Expense (Benefit) U.S. Federal Deferred Foreign Income Tax Expense (Benefit) Foreign Deferred Income Tax Expense (Benefit) Deferred income taxes Total deferred Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Deferred: The carrying value of deferred revenue, net of expenses, as of the balance sheet date that is expected to be recognized as such within one year or the normal operating cycle, if longer. Deferred Profit Deferred profit Deferred Revenue Deferred revenue Deferred State and Local Income Tax Expense (Benefit) U.S. State Deferred Tax Asset Acquisition Basis Differences Deferred Tax Asset Acquisition Basis Differences Acquisition basis differences Deferred Tax Assets, Deferred Income Deferred profit Deferred Tax Assets, Gross Gross deferred tax assets Deferred Tax Assets Inventory And Warranty Reserves Deferred Tax Assets Inventory And Warranty Reserves Inventory, receivable and warranty reserves Deferred Tax Assets, Net Net deferred tax liabilities Deferred Tax Assets, Net of Valuation Allowance Total deferred tax assets Deferred Tax Assets, Net [Abstract] Deferred tax assets: Deferred Tax Assets, Net of Valuation Allowance, Current Deferred income taxes Deferred Tax Assets, Operating Loss Carryforwards Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards, Domestic Net operating loss carryforwards, federal Deferred Tax Assets, Operating Loss Carryforwards, Foreign Net operating loss carryforwards, foreign Deferred Tax Assets, Operating Loss Carryforwards, State and Local Net operating loss carryforwards, state Deferred Tax Assets, Other Other Deferred Tax Assets, Property, Plant and Equipment Depreciation and fixed asset related Deferred Tax Assets, Tax Credit Carryforwards Tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards, Foreign Tax credit carryforwards, federal Deferred Tax Assets Tax Credit Carry Forwards State Deferred Tax Assets Tax Credit Carry Forwards State Tax credit carryforwards, state Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits Accrued employee benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Stock-based compensation Deferred Tax Assets, Valuation Allowance Valuation allowance Less valuation allowance Deferred Tax Liabilities, Net Total deferred tax liabilities Deferred Tax Liabilities Asset Basis Differences Deferred Tax Liabilities Asset Basis Differences Acquisition basis differences Deferred Tax Liabilities, Net [Abstract] Deferred tax liabilities: Deferred Tax Liabilities, Net, Noncurrent Deferred income taxes Deferred Tax Liabilities, Prepaid Expenses Other Deferred Tax Liabilities, Property, Plant and Equipment Depreciation and fixed asset related Defined Benefit Plan, Accumulated Benefit Obligation Accumulated benefit obligation at end of year Accumulated benefit obligation at beginning of year Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains (Losses), after Tax Amounts recognized in accumulated other comprehensive income related to the Swiss Plan unrecognized net actuarial gain (loss) Defined Benefit Plan, Actual Return on Plan Assets Return on assets, net of actuarial loss Defined Benefit Plan, Actuarial Gain (Loss) Actuarial (gain) loss Actuarial gain (loss) Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Discount rate Weighted average discount rate of accumulated post-retirement benefit obligation Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Compensation increase Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets Rate of return on Assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Compensation increase Defined Benefit Plan, Benefit Obligation Benefit obligation at end of year Benefit obligation at beginning of year Defined Benefit Plan, Benefits Paid Benefits paid Benefits paid Defined Benefit Plan, Asset Categories [Axis] Defined Benefit Plan, Asset Categories [Axis] Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Change in projected benefit obligation: Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Change in plan assets: Defined Benefit Plan, Contributions by Employer Employer contributions Defined Benefit Plan, Contributions by Plan Participants Participant contributions Defined Benefit Plan Decrease In Assumed Healthcare Cost Trend Rate Percentage Defined Benefit Plan Decrease In Assumed Healthcare Cost Trend Rate Percentage Assumed annual rates of decrease for cost of health benefits Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation Result of one percent decrease in accumulated post-retirement benefit obligation Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components Result of one percent decrease in net periodic benefit cost Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation Result of one percent increase in accumulated post-retirement benefit obligation Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components Result of one percent increase in net periodic benefit cost Defined Benefit Plan Estimated Future Employee Contributions In Next Fiscal Year Defined Benefit Plan Estimated Future Employee Contributions In Next Fiscal Year Employee contributions to Swiss Plan during fiscal 2015 Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter Estimated benefit payments, thereafter through 2024 Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months Estimated benefit payments, 2015 Defined Benefit Plan, Expected Future Benefit Payments, Year Five Estimated benefit payments, 2019 Defined Benefit Plan, Expected Future Benefit Payments, Year Four Estimated benefit payments, 2018 Defined Benefit Plan, Expected Future Benefit Payments, Year Three Estimated benefit payments, 2017 Defined Benefit Plan, Expected Future Benefit Payments, Year Two Estimated benefit payments, 2016 Defined Benefit Plan, Expected Return on Plan Assets Expected return on assets Defined Benefit Plan, Fair Value of Plan Assets Fair value of plan assets at end of year Fair value of plan assets at beginning of year Plan assets Plan assets at end of year Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss) Foreign currency exchange adjustment Defined Benefit Plan, Funded Status of Plan Funded status Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year Assumed annual rates of increase of cost of health benefits Defined Benefit Plan, Interest Cost Interest cost Interest cost Defined Benefit Plan, Net Periodic Benefit Cost Net periodic benefit cost Net Periodic Benefit Cost, Total Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement 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] Defined Benefit Plan, Service Cost Service cost Service cost Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year Employer contributions to Swiss Plan during fiscal 2015 Defined Benefit Plan, Target Allocation Percentage Target allocations for plan assets, Percentage Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Defined benefit plan cost of health benefit, trend rate Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate Defined benefit plan cost of health benefit, year that rate reaches ultimate rate Defined Contribution Plan, Employer Discretionary Contribution Amount Employer contributions to plan Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Matching contribution, percent Depreciation Total Depreciation expense