Consolidated Statements of Stockholders (Deficit) Equity (USD $) In Thousands, except Share data	Total	Common Stock	Treasury Stock	Paid in Capital	Accumulated Deficit
Beginning balance at Dec. 31, 2009	$ 11,302	$ 395	$ (10,945)	$ 286,903	$ (265,051)
Treasury stock, Beginning balance, shares at Dec. 31, 2009			(403,000)
Beginning balance, shares at Dec. 31, 2009		13,266,000
Stock issuance	41	5		36
Stock issuance, shares		66,000
Net income	(12,579)				(12,579)
Purchase of treasury stock	(712)		(712)
Purchase of treasury stock, shares			(46,000)
Stock-based compensation	2,047			2,047
Ending balance at Dec. 31, 2010	99	400	(11,657)	288,986	(277,630)
Treasury stock, Ending balance, shares at Dec. 31, 2010			(449,000)
Ending balance, shares at Dec. 31, 2010		13,332,000
Stock issuance		1		(1)
Stock issuance, shares		88,000
Net income	(7,710)				(7,710)
Purchase of treasury stock	(26)		(26)
Purchase of treasury stock, shares			(4,000)
Stock-based compensation	2,012			2,012
Ending balance at Dec. 31, 2011	(5,625)	401	(11,683)	290,997	(285,340)
Treasury stock, Ending balance, shares at Dec. 31, 2011	(452,930)		(453,000)
Ending balance, shares at Dec. 31, 2011		13,420,000
Stock issuance	56,566	139		56,427
Stock issuance, shares		4,600,000
Net income	96,308				96,308
Purchase of treasury stock	(57)		(57)
Purchase of treasury stock, shares			(4,000)
Stock-based compensation	2,166			2,166
Stock-based compensation, Shares		224,000
Net excess tax benefits from stock-based compensation	76			76
Ending balance at Dec. 31, 2012	$ 149,434	$ 540	$ (11,740)	$ 349,666	$ (189,032)
Treasury stock, Ending balance, shares at Dec. 31, 2012	(457,230)		(457,000)
Ending balance, shares at Dec. 31, 2012		18,244,000