Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful debts, accounts receivable	$ 1,645,000	$ 1,745,000
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	120,000,000us-gaap_CommonStockSharesAuthorized	120,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	53,243,157us-gaap_CommonStockSharesIssued	53,126,866us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	20,250,669us-gaap_CommonStockSharesOutstanding	20,979,392us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	32,992,488us-gaap_TreasuryStockShares	32,147,474us-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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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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