Note 11 - Stockholders' Equity and Stock Plans (Details) - Summary of Changes in Non-Vested Stock Options (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Note 11 - Stockholders' Equity and Stock Plans (Details) - Summary of Changes in Non-Vested Stock Options [Line Items]
Non-vested shares at April 1, 2013	1,479,000	1,348,437	1,328,937
Granted	511,000	327,500	30,000
Granted	$ 4.37	$ 1.99	$ 2.99
Non-vested shares at March 31, 2014	1,692,750	1,479,000	1,348,437
Non-Vested Stock Options [Member]
Note 11 - Stockholders' Equity and Stock Plans (Details) - Summary of Changes in Non-Vested Stock Options [Line Items]
Non-vested shares at April 1, 2013	540,063
Non-vested shares at April 1, 2013	$ 4.09
Granted	511,000
Granted	$ 4.37
Forfeited	(90,000)
Forfeited	$ 3.11
Vested	(213,813)
Vested	$ 5.04
Non-vested shares at March 31, 2014	747,250
Non-vested shares at March 31, 2014	$ 4.13