Line of Credit	6 Months Ended
Sep. 30, 2015
Debt Disclosure [Abstract]
Line of Credit	Note G — Line of Credit In September 2015, the Company renewed a line of credit agreement. 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, as amended, 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 as of September 30, 2015, but letters of credit in the aggregate amount of $4.5 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 2016.

Line of Credit

6 Months Ended

Sep. 30, 2015

Note G — Line of Credit

In September 2015, the Company renewed a line of credit agreement. 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, as amended, 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 as of September 30, 2015, but letters of credit in the aggregate amount of $4.5 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 2016.