2007 Plan Plan Name [Axis] Stock Option Plans Award Type [Axis] 2000 Plan Employee Stock Ownership Plan Employee Stock Ownership Plan (ESOP) Name [Axis] Document And Entity Information Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Amendment Description 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 relating to contracts in process, net of advance payments of $148,722 at December 31, 2013 and $146,916 at June 30, 2013 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 tax liability Total liabilities Common stock, par value $.33-1/3 per share. Authorized 10,000,000 shares; Issued 3,029,874 shares on December 31, 2013 and June 30, 2013. Outstanding 2,355,810 and 2,344,690 on December 31, 2013 and June 30,2013, respectively (includes 107,083 and 116,666 unearned ESOP shares) Capital in excess of par value Accumulated other comprehensive income Retained earnings [TotalStockholdersEquityBeforyEsopAndTreasuryStock] Less: Unearned ESOP shares Treasury shares, cost of 674,064 and 685,184 shares on December 31, 2013 and June 30, 2013, respectively Total stockholders' equity Total liabilities and stockholders' equity Advance payments of costs related to 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 and dividend income Other [NonoperatingIncomeExpense] Income before income taxes Provision for income taxes Net income Other comprehensive income, net of tax: Unrealized (loss) gain on investment securities Total comprehensive 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 Changes in assets and liabilities: Decrease (increase) in trade receivable, net Increase in income taxes receivables (Decrease) increase in inventories, net Decrease in prepaid expenses and other current assets Decrease in accounts payable Decrease in accrued salaries, wages and commissions Decrease in vacation accrual Decrease in ESOP payable (Decrease) increase in other accrued expenses (Decrease) increase 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 Proceeds from sale/maturity of investment securities Net cash used in 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 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 Disclosure [Abstract] Commitments and Contingencies Recently Issued Accounting Standards Recently Issued Accounting Standards Employee Stock Ownership Plan Employee Stock Ownership Plan Stock Based Compensation Tables Schedule of weighted average assumptions for option awards Schedule of stock option activity Schedule of changes in non-vested stock options Employee Stock Ownership Plan Tables Schedule of ESOP shares Statement [Table] Statement [Line Items] Stock based compensation expense Deferred tax benefit related to stock based compensation Unrecognized compensation costs Period in which compensation cost will be recognized Deferred tax benefit related to unrecognized compensation costs Authorized shares under plan Outstanding, ending Options granted Aggregate intrinsic value of options exercised Special cash dividend (per share) Stock-Based Compensation Details Weighted Average Assumptions Dividend yield Expected stock price volatility Risk-free interest rate Expected option life (in years) Weighted average fair value per share of options granted Stock-Based Compensation Details 1 Number of Shares Subject to Option Balance, beginning Granted Exercised Forfeited or expired Vested or expected to vest, end of period Exercisable, end of period Weight Average Exercise Price Balance, beginning Granted Exercised Forfeited or expired Outstanding, ending Vested or expected to vest, end of period Exercisable, end of period Weighted Average Remaining Contractual Term Balance, beginning Granted Outstanding, ending Vested or expected to vest, end of period Exercisable, end of period Aggregate Intrinsic Value Outstanding end of period Vested or expected to vest, end of period Exercisable, end of period Other Liabilities Disclosure [Abstract] Average Grant Date Fair Value Balance, beginning Granted Vested Forfeited or expired Outstanding, ending Weighted Average Number of Shares Subject to Option Non-vested, beginning balance Vested Forfeited or expired Non-vested, ending balance Plan description Number of hours worked per year Allocated shares Committed-to-be-released shares Unreleased shares Total shares held by the ESOP Fair value of unreleased shares Amount of deferred tax benefit attributable to unrecognized share-based compensation. Minimum number of hours worked per year for nonunion employees to participate in ESOP. The contractual life of stock options under the Company's plans. Total of all stockholders' equity (deficit) items, before ESOP and Treasury stock. Name of the equity-based compensation arrangement plan. Name of the equity-based compensation arrangement plan. Information by name of employee stock ownership plan. The entire disclosure for employee stock ownership plan. Inventory, Net Assets, Current Assets Liabilities, Current 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 Comprehensive Income (Loss), Net of Tax, Attributable to Parent Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Diluted Excess Tax Benefit from Share-based Compensation, Operating Activities Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Increase (Decrease) in Accounts Receivable Increase (Decrease) in Income Taxes Receivable Increase (Decrease) in Inventories Increase (Decrease) in Prepaid Expense and Other Assets Net Cash Provided by (Used in) Operating Activities Payments to Acquire Property, Plant, and Equipment Payments to Acquire Available-for-sale Securities Net Cash Provided by (Used in) Investing Activities Payments for Repurchase of Common Stock Net Cash Provided by (Used in) Financing Activities Cash and Cash Equivalents, Period Increase (Decrease) Disclosure of Compensation Related Costs, Share-based Payments [Text Block] New Accounting Pronouncements and Changes in Accounting Principles [Text Block] EmployeeStockOwnershipPlanAbstract EmployeeStockOwnershipPlanTextBlock Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodContractualTerm Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares