Note 12 - Income Taxes (Detail) - The income tax provision federal rate: (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income tax provision at U.S. statutory rate (in Dollars)	$ 928,000	$ 713,000
Income tax provision at U.S. statutory rate	34.00%	34.00%
State income taxes, net of Federal benefit (in Dollars)	99,000	60,000
State income taxes, net of Federal benefit	3.60%	2.90%
Permanent differences, other (in Dollars)	30,000	32,000
Permanent differences, other	1.10%	1.50%
Other differences, net (in Dollars)	3,000	(59,000)
Other differences, net	0.10%	(2.80%)
Income tax provision (in Dollars)	$ 1,060,000	$ 746,000
Income tax provision	38.80%	35.60%