Consolidated Balance Sheets (Parentheticals) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Statement of Financial Position [Abstract]
Preferred stock, no par value (in dollars per share)
Preferred stock, shares authorized	5,000,000us-gaap_PreferredStockSharesAuthorized	5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued
Common stock, no par value (in dollars per share)
Common stock, shares authorized	50,000,000us-gaap_CommonStockSharesAuthorized	50,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	12,415,785us-gaap_CommonStockSharesIssued	12,220,874us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	7,701,981us-gaap_CommonStockSharesOutstanding	12,220,874us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	4,713,804us-gaap_TreasuryStockShares	4,713,804us-gaap_TreasuryStockShares

Face amount per share of no-par value common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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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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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Face amount per share of no-par value preferred stock nonredeemable or redeemable solely at the option of the issuer.

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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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