Note 13 - Income Taxes (Details) - Difference in Income Tax Provision (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Difference in Income Tax Provision [Abstract]
Income tax provision at U.S. statutory rate	$ 904,000	$ 928,000
Income tax provision at U.S. statutory rate	34.00%	34.00%
State income taxes, net of Federal benefit	203,000	99,000
State income taxes, net of Federal benefit	7.60%	3.60%
Permanent differences, other	15,000	30,000
Permanent differences, other	0.60%	1.10%
Other differences, net	70,000	3,000
Other differences, net	2.60%	0.10%
Income tax provision	$ 1,192,000	$ 1,060,000
Income tax provision	44.80%	38.80%