Balance Sheets (Unaudited) (Parenthetical) (USD $)	Dec. 31, 2014	Jun. 30, 2014
Statement of Financial Position [Abstract]
Trade accounts receivable, allowance	$ 3,000	$ 3,000
Advance payments of costs related to contracts in process	$ 19,626	$ 142,616
Common stock, par value	$ 0.3333	$ 0.3333
Common stock, shares authorized	10,000,000us-gaap_CommonStockSharesAuthorized	10,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	3,029,874us-gaap_CommonStockSharesIssued	3,029,874us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	2,355,357us-gaap_CommonStockSharesOutstanding	2,368,110us-gaap_CommonStockSharesOutstanding
Unearned ESOP, shares	88,333	97,500
Treasury stock, shares	674,517us-gaap_TreasuryStockShares	661,764us-gaap_TreasuryStockShares

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

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Face amount or stated value per share of common stock.

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Number of common stock held in a trust that has been set up specifically to accumulate stock for the sole purpose of distribution to participating employees but not yet earned.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Amount of advances received from customers under long-term contracts which have been offset against inventories accounts at the balance sheet date.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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