Stock Option Plans and 401(k) Plan (Details 3) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Options outstanding at end of period	4,249,271	4,912,604	4,805,771
Weighted Average Remaining Years until Expiration	6 years 6 months 7 days
Weighted average exercise price, Options outstanding at end of period	$ 0.50	$ 1.32	$ 1.53
Options exercisable at end of period	3,655,061	4,227,436
Weighted average exercise price, Options exercisable at end of period	$ 0.50	$ 1.35
$0.40 [Member]
Options outstanding at end of period	1,041,550
Weighted Average Remaining Years until Expiration	8 years 6 months 11 days
Weighted average exercise price, Options outstanding at end of period	$ 0.40
Options exercisable at end of period	810,560
Weighted average exercise price, Options exercisable at end of period	$ 0.40
$0.50 [Member]
Options outstanding at end of period	2,988,695
Weighted Average Remaining Years until Expiration	5 years 10 months 24 days
Weighted average exercise price, Options outstanding at end of period	$ 0.50
Options exercisable at end of period	2,657,665
Weighted average exercise price, Options exercisable at end of period	$ 0.50
$0.72 - $1.80 [Member]
Options outstanding at end of period	219,026
Weighted Average Remaining Years until Expiration	5 years 5 months 16 days
Weighted average exercise price, Options outstanding at end of period	$ 1.06
Options exercisable at end of period	186,836
Weighted average exercise price, Options exercisable at end of period	$ 1.00