Consolidated Statements of Stockholders' (Deficit) Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance as of December 31 at Dec. 31, 2009	$ 135	$ 276,749	$ (265,651)	$ 11,233
Balance as of December 31 (in Shares) at Dec. 31, 2009	13,500,997
Issuance of shares pursuant to stock awards	2			2
Issuance 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 as of December 31 at Dec. 31, 2010	137	282,359	(281,550)	946
Balance as of December 31 (in Shares) at Dec. 31, 2010	13,677,772
Issuance of shares pursuant to stock awards	1			1
Issuance of shares pursuant to stock awards (in Shares)	151,466
Issuance of shares pursuant to Private Placement and Shelf Takedown	16	15,113		15,129
Issuance of shares pursuant to 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 as of December 31 at Dec. 31, 2011	154	300,163	(298,387)	1,930
Balance as of December 31 (in Shares) at Dec. 31, 2011	15,429,541
Issuance of shares pursuant to stock awards (in Shares)	9,420
Stock compensation expense		343		343
Issuance of warrants		533		533
Net loss			(19,574)	(19,574)
Balance as of December 31 at Dec. 31, 2012	$ 154	$ 301,039	$ (317,961)	$ (16,768)
Balance as of December 31 (in Shares) at Dec. 31, 2012	15,438,961