Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Preferred Stock [Member]	Warrant [Member]	Additional Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2009	$ 1,302	$ 0	$ 0	$ 350,243	$ (228,076)	$ 445	$ 123,914
Balance (in shares) at Dec. 31, 2009	13,021,000	0	0
Comprehensive (loss) income:
Net loss					(6,434)		(6,434)
Unrealized gain (loss) on investment, net of taxes						548	548
Issuance of common stock upon issuance of restricted stock awards	4			0	0	0	4
stock upon issuance of restricted stock awards (in shares)	39,000
Issuance of common stock upon merger	259			18,160	0	0	18,419
Issuance of common stock upon merger (in shares)	2,594,000
Issuance of preferred stock upon merger		918		55,108	0	0	56,026
Issuance of preferred stock upon merger (in shares)		9,175,000
Exercise of stock options (in shares)							0
Stock compensation expense	0			366	0	0	366
Balance at Dec. 31, 2010	1,565	918	0	423,877	(234,510)	993	192,843
Balance (in shares) at Dec. 31, 2010	15,654,000	9,175,000	0
Comprehensive (loss) income:
Net loss					(59,664)		(59,664)
Unrealized gain (loss) on investment, net of taxes						(543)	(543)
1 for 10 reverse stock split	(2,235)			2,235			0
Exercise of stock options	0			32	0	0	32
Exercise of stock options (in shares)	5,200						5,200
Conversion of preferred stock into common stock	918	(918)			0	0
Conversion of preferred stock into common stock (in shares)	9,174,000	(9,175,000)
Stock compensation expense	0			1,599	0	0	1,599
Balance at Dec. 31, 2011	248	0	0	427,743	(294,174)	450	134,267
Balance (in shares) at Dec. 31, 2011	24,833,000	0	0
Comprehensive (loss) income:
Net loss					(41,374)		(41,374)
Unrealized gain (loss) on investment, net of taxes						(450)	(450)
Fair value of warrants granted in connection with debt financing			790				790
Fair value of warrants granted in connection with debt financing (in shares)			330,000
Net proceeds from the issuance of common stock	63			25,595			25,658
Net proceeds from the issuance of common stock (in shares)	6,304,102						3,925,000
Conversion of RSUs into common stock	3			(3)	0	0	0
Conversion of RSUs into common stock (in shares)	321,000
Exercise of stock options	1			213	0	0	214
Exercise of stock options (in shares)	30,250						30,250
Stock compensation expense	0			1,777	0	0	2,417
Balance at Dec. 31, 2012	$ 315	$ 0	$ 790	$ 455,325	$ (335,548)	$ 0	$ 120,882
Balance (in shares) at Dec. 31, 2012	31,488,000	0	330,000