CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2008
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares forfeited pursuant to stock awards	$ 0
Issuance of warrants	0
Balance at Dec. 31, 2009	45	301,831	(273,735)	28,141
Balance (in shares) at Dec. 31, 2009	45,168,706
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares forfeited pursuant to stock awards		0	0
Shares forfeited pursuant to stock awards (in shares)	(19,030)
Share-based compensation	0	1,101	0	1,101
Issuance of warrants		1,260	0	1,260
Premium on convertible note	0	900	0	900
Issuance of common stock upon exercise of stock options	1	264	0	265
Issuance of common stock upon exercise of stock options (in shares)	539,386
Net loss	0	0	(8,564)	(8,564)
Balance at Dec. 31, 2010	46	305,356	(282,299)	23,103
Balance (in shares) at Dec. 31, 2010	45,689,062			45,689,062
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares forfeited pursuant to stock awards	0	0	0
Shares forfeited pursuant to stock awards (in shares)	(556)
Share-based compensation	0	1,032	0	1,032
Issuance of common stock upon exercise of stock options	0	345	0	345
Issuance of common stock upon exercise of stock options (in shares)	433,221
Net loss	0	0	416	416
Balance at Dec. 31, 2011	$ 46	$ 306,733	$ (281,883)	$ 24,896
Balance (in shares) at Dec. 31, 2011	46,121,727			46,121,727