Document And Entity Information Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Is Entity a Well-known Seasoned Issuer? Is Entity a Voluntary Filer? Is Entity's Reporting Status Current? Entity Filer Category Entity Common Stock, Shares Outstanding Document Fiscal Period Focus Document Fiscal Year Focus Statement of Financial Position [Abstract] ASSETS Cash and cash equivalents Investment securities Trade accounts receivable, net Income tax receivable Inventories: Raw materials Work-in-process Costs related to contracts in process, net of progress payments Total inventories Deferred income taxes Prepaid expenses and other current assets Total current assets Property, plant and equipment, net Loan receivable Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Accounts payable Accrued expenses: Salaries, wages and commissions Vacation ESOP payable Other Payroll and other taxes withheld and accrued Income taxes payable Total current liabilities Deferred income taxes Total liabilities Common stock Capital in excess of par value Accumulated other comprehensive income/loss Retained earnings [TotalStockholdersEquityBeforyEsopAndTreasuryStock] Less: Unearned ESOP shares Treasury shares Total stockholders' equity Total liabilities and stockholders' equity Progress payments of contracts in process Common stock, par value Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Unearned ESOP, shares Treasury stock, shares Income Statement [Abstract] Net sales Cost of sales Gross profit Selling, general and administrative expenses Operating income Other income Interest income Other Total other income Income before income taxes Provision for income taxes Net income Net income per share: Basic Diluted Weighted average number of shares outstanding: Basic Diluted Dividends per share: Statement of Cash Flows [Abstract] Cash Flows From Operating Activities: Net income Adjustments to reconcile net income to net cash provided by operating activities: Excess tax benefits from share-based compensation Stock-based compensation Depreciation ESOP compensation expense Loss on disposal of assets Deferred income tax benefit Changes in assets and liabilities: Decrease in trade receivable, net (Increase) in income taxes receivables (Increase) in ESOP receivable due to dividends on unallocated shares (Increase) decrease in inventories Decrease (increase) in prepaid expenses and other current assets Increase (decrease) in accounts payable (Decrease) increase in accrued salaries, wages and commissions Decrease in vacation accrual Decrease in ESOP payable Increase (decrease) in other accrued expenses Increase (decrease) in payroll and other taxes withheld and accrued Decrease in income taxes payable Net cash provided by operating activities Cash Flows From Investing Activities: Additions to property, plant and equipment Proceeds from loan receivable Purchase of investment securities Maturity of investment securities Net cash (used in) provided by investing activities Cash Flows From Financing Activities: Sale of treasury stock Dividends on common stock Purchase of treasury stock Proceeds from exercise of stock options Excess tax benefits from share-based compensation Net cash used in financing activities (Decrease) increase in cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Supplemental Schedule of Cash Flow Information: Income taxes paid Basis Of Presentation Basis of Presentation Net Income Per Share Net Income per Share Stock Based Compensation Stock Based Compensation Commitments And Contingencies Commitments and Contingencies Recently Issued Accounting Standards Recently Issued Accounting Standards Employee Stock Ownership Plan Employee Stock Ownership Plan Inventory, Net Assets, Current Assets Liabilities, Current Deferred Tax Liabilities, Noncurrent Liabilities, Noncurrent TotalStockholdersEquityBeforyEsopAndTreasuryStock Unearned ESOP Shares Treasury Stock, Value Stockholders' Equity Attributable to Parent Liabilities and Equity Gross Profit Operating Income (Loss) Other Nonoperating Income Nonoperating Income (Expense) Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Diluted Net Cash Provided by (Used in) Operating Activities Payments to Acquire Property, Plant, and Equipment Payments to Acquire Short-term Investments Net Cash Provided by (Used in) Investing Activities Payments of Dividends, Common Stock Payments for Repurchase of Other Equity Excess Tax Benefit from Share-based Compensation, Financing Activities Net Cash Provided by (Used in) Financing Activities Disclosure of Compensation Related Costs, Share-based Payments [Text Block] RecentlyIssuedAccountingStandardsTextBlock Schedule of Employee Stock Ownership Plan (ESOP) Disclosures [Table Text Block] The increase (decrease) during the reporting period in ESOP payable. Total of all stockholders' equity (deficit) items, before ESOP and Treasury stock. Description of new accounting pronouncements. The number of Unearned ESOP shares. The (increase) decrease during the reporting period in ESOP due to dividends on unallocated shares.