Statement of Financial Position [Abstract] ASSETS: ASSETS: [Abstract] Current assets: Current assets: [Abstract] Cash and cash equivalents Marketable securities Accounts receivable, net of allowance for doubtful accounts of $288 in 2013 and $400 in 2012 Costs and estimated earnings in excess of billings, net Inventories, net Deferred income taxes Prepaid income taxes Prepaid expenses and other Total current assets Property, plant and equipment, at cost, net of accumulated depreciation and amortization Deferred income taxes Goodwill and other intangible assets Cash Surrender Value Of Life Insurance And Cash Held In Trust Cash surrender value of life insurance and cash held in trust Other assets Total assets LIABILITIES AND STOCKHOLDERS' EQUITY: LIABILITIES AND STOCKHOLDERS' EQUITY: [Abstract] Current liabilities: Current liabilities: [Abstract] Short-term credit obligations Accounts payable - trade Accrued liabilities Income taxes payable Total current liabilities Credit obligations- noncurrent Deferred compensation Deferred Rent And Other Long Term Liabilities Noncurrent Deferred rent and other liabilities Total liabilities Commitments and contingencies Stockholders' equity: Stockholders' equity: [Abstract] Preferred stock, $1.00 par value authorized 600 shares, no shares issued Common stock, $1.00 par value; authorized 20,000 shares, 9,164 shares issued and 8,463 outstanding in 2013; 8,363 outstanding in 2012 Additional paid-in capital Retained earnings Common stock reacquired and held in treasury - at cost (701 shares in 2013 and 801 shares in 2012) Accumulated other comprehensive income Total stockholders' equity Total liabilities and stockholders' equity Allowance for doubtful accounts (in Dollars) Preferred stock, par value (in Dollars per share) Preferred stock, shares authorized (in Shares) Preferred stock, shares issued (in Shares) Common stock par value (in Dollars per share) Common stock, shares authorized (in Shares) Common stock, shares issued (in Shares) Common stock, shares outstanding (in Shares) Treasury stock, shares (in Shares) Income Statement [Abstract] Revenues Cost of revenues Gross margin Selling and administrative expenses Research and development expenses Operating profit Other income (expense): Other income (expense): [Abstract] Investment income Gain on investment in affiliate Equity loss Impairment of investment in affiliate Interest expense Other expense, net Income before provision (benefit) for income taxes Provision (Benefit) for income taxes Net income Net income per common share: Net income per common share: [Abstract] Basic (in Dollars per share) Diluted (in Dollars per share) Average shares outstanding: Average shares outstanding: [Abstract] Basic (in Shares) Diluted (in Shares) Statements of Comprehensive Income Statements of Comprehensive Income [Abstract] Net Income Other comprehensive income (loss): Other comprehensive income (loss): [Abstract] Foreign currency translation adjustment Amount before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities. Change in market value of marketable securities Deferred tax effect of change in marketable securities Total other comprehensive income (loss) Comprehensive income Statement of Cash Flows [Abstract] Cash flows from operating activities: Cash flows from operating activities: [Abstract] Adjustments to reconcile net income to net cash provided in operating activities: Adjustments to reconcile net income to net cash provided in operating activities: [Abstract] Deferred income tax benefit Depreciation and amortization Deferred lease obligation Amount of expense related to write-down of accounts receivable, inventories and warranty reserve. Provision for losses on accounts receivable, inventories and warranty reserve (Gain) Loss on marketable securities and other assets, net Gain on investment in affiliate Equity loss Impairment of investment in affiliate Employee benefit plans expense Stock-based compensation expense Tax benefit from exercise of stock-based compensation Changes in operating assets and liabilities: Changes in operating assets and liabilities: [Abstract] Accounts receivable Inventories Prepaid expenses and other Other assets Accounts payable - trade Accrued liabilities Income taxes refundable/payable Other liabilities Net cash provided by operating activities Cash flows from investing activities: Cash flows from investing activities: [Abstract] Acquisition of FEI-Elcom, net of $763 cash acquired Purchase of marketable securities Proceeds from sale or redemption of marketable securities Proceeds from sale of fixed assets Capital expenditures Net cash used in investing activities Cash flows from financing activities: Cash flows from financing activities: [Abstract] Proceeds from credit line borrowing Payment of short-term credit and lease obligations Proceeds from exercise of stock options Dividends Tax benefit from exercise of stock-based compensation Net cash provided by (used in) financing activities Cash and Cash Equivalents, Period Increase (Decrease) Before Adjustment Net decrease in cash and cash equivalents before effect of exchange rate changes Effect of exchange rate changes on cash and cash equivalents Net decrease in cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Supplemental disclosures of cash flow information: Supplemental disclosures of cash flow information: [Abstract] Cash paid during the year for: Cash paid during the year for: [Abstract] Interest Income taxes Allocation of fair value to net assets acquired on fiscal year 2012 purchase of FEI-Elcom Tech, Inc. Allocation of fair value to net assets acquired on fiscal year 2012 purchase of FEI-Elcom Tech, Inc. [Abstract] Cash Accounts receivable Inventory Other current assets Fixed assets Business Acquisition, Purchase Price Allocation, Intangible Assets and Goodwill Goodwill and other intangible assets Deferred tax assets Other assets Accounts payable Accrued expenses Capital lease obligations Acquisition of FEI-Elcom, cash acquired (in Dollars) Statement of Stockholders' Equity [Abstract] Equity Component [Domain] Balance Balance Balance (in Shares) Balance (in Shares) Contribution of stock to 401(k) plan Contribution of stock to 401(k) plan (in Shares) Stock-based compensation expense Stock-based compensation expense (in Shares) Tax benefit from stock option exercise Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price (in Shares) Change in unrealized gains and losses on marketable securities - net Foreign currency translation adjustment Net Income Cash dividend $0.20 per share Cash dividend, per share (in Dollars per share) Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Significant Accounting Policies [Text Block] Earnings Per Share [Abstract] Earnings Per Share [Text Block] Earnings Per Share [Text Block] Long-term Contracts or Programs Disclosure [Abstract] Long-term Contracts or Programs Disclosure [Text Block] Long-term Contracts or Programs Disclosure [Text Block] Inventory Disclosure [Abstract] Inventory Disclosure [Text Block] Inventory Disclosure [Text Block] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Abstract] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Property, Plant and Equipment Disclosure [Abstract] Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment Disclosure [Text Block] Debt Disclosure [Abstract] Debt Disclosure [Text Block] Debt Disclosure [Text Block] Accounts Payable and Accrued Liabilities Disclosure [Abstract] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Investment Holdings [Abstract] Investment Holdings [Text Block] Investment Holdings [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets Disclosure [Text Block] Business Combination Disclosure [Abstract] Business Combination Disclosure [Text Block] Business Combination Disclosure [Text Block] Compensation and Employee Benefit Plans [Abstract] Compensation and Employee Benefit Plans [Text Block] Compensation and Employee Benefit Plans [Text Block] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block]