Consolidated Statements of Stockholders' Equity (Deficit) (USD $) In Thousands, except Share data	Cashless Exercise of Stock Options [Member] Common Stock [Member]	Cashless Exercise of Stock Options [Member] Additional Paid-in Capital [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
Balance at Mar. 31, 2011			$ 440	$ 94,339		$ (88,255)	$ 6,524
Balance (in Shares) at Mar. 31, 2011			44,025,000
Exercise of stock options	7	(7)	4	424			428
Exercise of stock options (in Shares)	706,000		348,000
Issuance of stock warrants to lender—related party				1,611			1,611
Issuance of restricted stock awards			4	(4)
Issuance of restricted stock awards (in Shares)			406,000
Cancellation of restricted stock awards			(1)	1
Cancellation of restricted stock awards (in Shares)			(89,000)
Common stock repurchased					(14)		(14)
Common stock repurchased (in Shares)					7,000
Stock-based compensation expense				2,018			2,018
Net loss						(11,016)	(11,016)
Balance at Mar. 31, 2012			454	98,382	(14)	(99,271)	(449)
Balance (in Shares) at Mar. 31, 2012			45,396,000		7,000
Exercise of stock options			1	98			99
Exercise of stock options (in Shares)			88,000
Issuance of restricted stock awards (in Shares)			40,000
Cancellation of restricted stock awards (in Shares)			(50,000)
Sale of common stock, net of fees of $122			6	872			878
Sale of common stock, net of fees of $122 (in Shares)			600,000
Issuance of commitment shares (in Shares)			175,000				230,000
Issuance of commitment shares			2	(2)
Common stock repurchased					(36)		(36)
Common stock repurchased (in Shares)					27,000
Stock-based compensation expense				1,469			1,469
Net loss						(10,557)	(10,557)
Balance at Mar. 31, 2013			$ 463	$ 100,819	$ (50)	$ (109,828)	$ (8,596)
Balance (in Shares) at Mar. 31, 2013			46,249,000		34,000