Note 11 - Option Activity (Details) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Shares (in shares)	101,500	212,500
Weighted Average Exercise Price Per Share (in dollars per share)	$ 8.73	$ 8.60
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	10,000
Weighted Average Exercise Price Per Share (in dollars per share)		$ 10.56
Shares (in shares)	(17,500)	(2,500)
Weighted Average Exercise Price Per Share (in dollars per share)	$ 8.61	$ 10.15
Shares (in shares)	(6,000)	(2,500)
Weighted Average Exercise Price Per Share (in dollars per share)	$ 8.29	$ 10.15
Shares (in shares)	(32,000)	(116,000)
Weighted Average Exercise Price Per Share (in dollars per share)	$ 8.96	$ 8.58
Shares (in shares)	46,000	101,500
Weighted Average Exercise Price Per Share (in dollars per share)	$ 8.68	$ 8.73
Weighted Average Remaining Life (Years)	2 years 317 days	3 years 142 days
Aggregate Intrinsic Value	$ 732,000	$ 342,000
Shares (in shares)	46,000
Weighted Average Exercise Price Per Share (in dollars per share)	$ 8.68
Weighted Average Remaining Life (Years)	2 years 317 days
Aggregate Intrinsic Value	$ 732,000