Note 11 - Employee and Non-Employee Stock Options (Details) - Option Activity (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2011
Option Activity [Abstract]
Outstanding at March 31, 2012	212,500		200,000
Outstanding at March 31, 2012	$ 8.60		$ 8.59
Granted	10,000	12,500
Granted	$ 10.56	$ 8.70
Exercised	(2,500)
Exercised	$ 10.15
Forfeited	(2,500)
Forfeited	$ 10.15
Repurchased	(116,000)
Repurchased	$ 8.58
Outstanding	101,500	212,500	200,000
Outstanding	$ 8.73	$ 8.60	$ 8.59
Outstanding	3 years 142 days
Outstanding	$ 342,000
Exercisable at March 31, 2014	91,500
Exercisable at March 31, 2014	$ 8.53
Exercisable at March 31, 2014	2 years 266 days
Exercisable at March 31, 2014	$ 326,000