Stock-Based Compensation - Stock option activity summary (Details) (USD $)	9 Months Ended
	Dec. 31, 2012
Notes to Financial Statements
Options outstanding at beginning of period	4,805,771
Options granted	1,075,550
Options forfeited	(870,550)
Options expired	(44,000)
Weighted Average Exercise Price
Options outstanding at beginning of period	$ 1.53
Options granted	$ 0.72
Options forfeited	$ 1.72
Options expired	$ 0.79
Options outstanding at end of period	$ 1.33
Options exercisable at end of period	$ 1.36