Line of Credit	12 Months Ended
Mar. 31, 2012
Line of Credit [Abstract]
Line of Credit	Note M — Line of Credit In September 2011, the Company renewed a credit agreement that had been in place throughout fiscal 2012. The line is with a financial institution to provide a revolving credit facility with borrowing capacity of up to $10 million. Borrowings under this agreement bear interest, at the Company’s option, at a fixed LIBOR-based rate plus 1.50% or at a fluctuating rate determined by the financial institution to be 1.50% above the daily one-month LIBOR rate. The loan covenants require the Company to maintain the current assets to liabilities ratio of at least 1.25:1, debt to tangible net worth not greater than 1.25:1 and have positive net income. There were no outstanding revolving loans at any time during fiscal 2012 or as of the date hereof, but letters of credit in the aggregate amount of $8.0 million have been issued separate from the line of credit and therefore do not reduce the amount of borrowings available under the revolving credit facility. The renewed credit agreement expires in September 2012.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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