Note 10 - Employee and Non-Employee Stock Options (Detail) - Option activity: (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Shares	200,000	229,500
Weighted Average Exercise Price Per Share (in Dollars per share)	$ 8.59	$ 8.59
Weighted Average Remaining Life (Years)	3 years 299 days
Aggregate Intrinsic Value (in Dollars)	$ 219,000
Exercisable at March 31, 2013	200,000
Exercisable at March 31, 2013 (in Dollars per share)	$ 8.59
Exercisable at March 31, 2013	3 years 171 days
Exercisable at March 31, 2013 (in Dollars)	$ 209,000
Shares	12,500	0
Weighted Average Exercise Price Per Share (in Dollars per share)	$ 8.70
Shares		(15,000)
Weighted Average Exercise Price Per Share (in Dollars per share)		$ 8.29
Shares		(14,500)
Weighted Average Exercise Price Per Share (in Dollars per share)		$ 8.80
Shares	212,500	200,000
Weighted Average Exercise Price Per Share (in Dollars per share)	$ 8.60	$ 8.59