Stock Option Plans and 401(k) Plan (Details 2) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Number of Shares
Options outstanding at beginning of period	4,912,604	4,805,771
Options granted	381,000	1,075,550
Options exercised
Options cancelled		(870,550)
Options forfeited	(79,080)	(29,167)
Options expired	(965,253)	(69,000)
Options outstanding at end of period	4,249,271	4,912,604
Options exercisable at end of period	3,655,061	4,227,436
Weighted Average Exercise Price
Weighted average exercise price, Options outstanding at beginning of period	$ 1.32	$ 1.53
Options granted	$ 0.54	$ 0.72
Options exercised
Options cancelled		$ 1.72
Options forfeited	$ 1.75	$ 1.75
Options expired	$ 1.20	$ 1.34
Weighted average exercise price, Options outstanding at end of period	$ 0.50	$ 1.32
Weighted average exercise price, Options exercisable at end of period	$ 0.50	$ 1.35
Weighted average grant-date fair value of options granted during the period	$ 0.42	$ 0.52