Consolidated Statements Of Stockholders' Equity (USD $) In Thousands	Common Stock [Member]	Preferred Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings (Accumulated Deficit) [Member]	Total
Balance at Dec. 31, 2008	$ 2		$ (497)	$ 77,253	$ 125	$ (10,778)	$ 66,105
Balance, shares at Dec. 31, 2008	23,174		159
Net income (loss)						(50,333)	(50,333)
Foreign currency translation adjustment					(7)		(7)
Comprehensive income (loss)							(50,340)
Sale of preferred stock and detachable warrants		10,806					10,806
Sale of preferred stock and detachable warrants, shares		16
Issuance costs of preferred stock and detachable warrants				(1,199)			(1,199)
Accretion of discount on preferred stock		1,331				(1,331)
Preferred stock dividends, net of forfeitures						(900)	(900)
Beneficial conversion discount on preferred stock		(5,194)		5,194
Stock options exercised				30			30
Stock options exercised, shares	100
Restricted shares issued and treasury stock purchase in payment of 2008 bonus			(48)	481			433
Restricted shares issued and treasury stock purchase in payment of 2008 bonus, shares	471		35
Restricted stock granted
Restricted stock granted, shares	423
Restricted stock forfeited
Restricted stock forfeited, shares			152
Excess (Reduction) in tax benefit related to share-based awards				(195)			(195)
Stock compensation expense				1,731			1,731
Tax benefit related to convertible debt bifurcation				725			725
Balance at Dec. 31, 2009	2	6,943	(545)	84,020	118	(63,342)	27,196
Balance, shares at Dec. 31, 2009	24,168	16	346
Net income (loss)						(43,465)	(43,465)
Foreign currency translation adjustment					(21)		(21)
Comprehensive income (loss)							(43,486)
Common stock issued in payment of debt issuance costs	1			5,095			5,096
Common stock issued in payment of debt issuance costs, shares	4,042
Common stock issued in exchange of convertible notes				1,992			1,992
Common stock issued in exchange of convertible notes, shares	1,569
Accretion of discount on preferred stock		5,132				(5,132)
Preferred stock dividends, net of forfeitures						(1,411)	(1,411)
Stock warrants exercised	1			4,452			4,453
Stock warrants exercised, shares	3,923
Stock options exercised				114			114
Stock options exercised, shares	140
Restricted stock granted, shares	827
Restricted stock forfeited
Restricted stock forfeited, shares			23
Treasury stock purchased			(347)				(347)
Treasury stock purchased, shares			196
Excess (Reduction) in tax benefit related to share-based awards				(1,744)			(1,744)
Stock compensation expense				4,684			4,684
Conversion of preferred stock into common stock		(4,795)		4,795
Conversion of preferred stock into common stock, shares	2,085	(5)
Balance at Dec. 31, 2010	4	7,280	(892)	103,408	97	(113,350)	(3,453)
Balance, shares at Dec. 31, 2010	36,754	11	565
Net income (loss)						31,408	31,408
Foreign currency translation adjustment					(141)		(141)
Comprehensive income (loss)							31,267
Sale of common stock, net of issuance cost				29,438			29,438
Sale of common stock, net of issuance cost, shares	3,665
Common stock issued in payment of term loan debt				1,398			1,398
Common stock issued in payment of term loan debt, shares	171
Common stock issued in payment of convertible notes				5,165			5,165
Common stock issued in payment of convertible notes, shares	559
Accretion of discount on preferred stock		3,925				(3,925)
Common stock issued in payment of preferred stock dividends				3,254			3,254
Common stock issued in payment of preferred stock dividends, shares	624
Preferred stock dividends, net of forfeitures						(943)	(943)
Stock warrants exercised	3,961			4,793			4,793
Stock options exercised	64			147			147
Restricted stock granted	1,288
Restricted stock forfeited			11
Treasury stock purchased			(775)				(775)
Treasury stock purchased, shares			81
Excess (Reduction) in tax benefit related to share-based awards				570			570
Stock compensation expense				7,437			7,437
Conversion of preferred stock into common stock	1	(11,205)		11,204
Conversion of preferred stock into common stock, shares	4,872	(11)
Return of borrowed shares under share lending agreement, shares			701
Balance at Dec. 31, 2011	$ 5		$ (1,667)	$ 166,814	$ (44)	$ (86,810)	$ 78,298
Balance, shares at Dec. 31, 2011	51,958		1,358