(4) Bank Credit Facility (Detail) (USD $)	6 Months Ended
	Sep. 30, 2012	Nov. 23, 2011
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)		$ 4,000,000
Cash Collateral for Borrowed Securities (in Dollars)		500,000
Line of Credit Facility, Interest Rate Description	accrues on outstanding loans at a per annum rate equal to the greater of (i) 4.0%, and (ii) the Bank's prime rate as from time to time in effect plus one percent
Line of Credit Facility, Borrowing Capacity, Description	loans outstanding at any time are limited to a borrowing base equal to 80% of the Company's eligible accounts receivable, as determined by the Bank, provided that the advance rate is limited to 50% with respect to accounts receivable from customers of the Company whose receivables constitute more than 50% of the Company's receivables in the aggregate;
Line of Credit Facility, Covenant Terms	Among other things, these covenants restrict the Company's ability to pay dividends, provide that the Company's debt service coverage ratio (as determined pursuant to the Loan Agreement) cannot be less than 1.25 to 1.0 as of the end of any fiscal year, and require that the Company have immediately available cash at all times, including borrowings under the Credit Facility, of at least $3 million. The Company was in compliance with these covenants at December 31, 2012 and March 31, 2012.
Debt Instrument, Fee Amount (in Dollars)		$ 30,000