Note 8 - Share-Based Compensation - Summary of Non-Vested Options (Details) - $ / shares	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Nonvested at March 31, 2014 (in shares)	851,066
Nonvested at March 31, 2014 (in dollars per share)	$ 3.22
Granted (in shares)	45,000	6,000
Granted (in dollars per share)	$ 2.73
Vested (in shares)	(264,570)
Vested (in dollars per share)	$ 3.06
Forfeited (in shares)	(17,080)
Forfeited (in dollars per share)	$ 3.18
Nonvested at March 31, 2015 (in shares)	614,416	851,066
Nonvested at March 31, 2015 (in dollars per share)	$ 3.25	$ 3.22