Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2008	$ 125	$ 263,533	$ (251,252)	$ 12,406
Balance (in Shares) at Dec. 31, 2008	12,453,210
Issurance of shares pursuant to stock awards	1			1
Issurance of shares pursuant to stock awards (in Shares)	147,026
Issuance of shares pursuant to warrant exercises, Private Placement, and shelf takedown	8	8,827		8,835
Issuance of shares pursuant to warrant exercises, Private Placement, and shelf takedown (in Shares)	841,449
Issuance of common stock for services	1	499		500
Issuance of common stock for services (in Shares)	59,312
Convertible term loan conversion option		1,617		1,617
Stock compensation expense		2,273		2,273
Net loss			(14,399)	(14,399)
Balance at Dec. 31, 2009	135	276,749	(265,651)	11,233
Balance (in Shares) at Dec. 31, 2009	13,500,997
Issurance of shares pursuant to stock awards	2			2
Issurance of shares pursuant to stock awards (in Shares)	176,775
Convertible term loan conversion option		1,603		1,603
Stock compensation expense		4,007		4,007
Net loss			(15,899)	(15,899)
Balance at Dec. 31, 2010	137	282,359	(281,550)	946
Balance (in Shares) at Dec. 31, 2010	13,677,772
Issurance of shares pursuant to stock awards	1			1
Issurance of shares pursuant to stock awards (in Shares)	151,466
Issuance of shares pursuant to warrant exercises, Private Placement, and shelf takedown	16	15,113		15,129
Issuance of shares pursuant to warrant exercises, Private Placement, and shelf takedown (in Shares)	1,600,303
Convertible term loan conversion option		343		343
Stock compensation expense		2,348		2,348
Net loss			(16,837)	(16,837)
Balance at Dec. 31, 2011	$ 154	$ 300,163	$ (298,387)	$ 1,930
Balance (in Shares) at Dec. 31, 2011	15,429,541