CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (USD $) In Thousands, except Share data	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total
Balance, beginning at Dec. 31, 2011	$ 44	$ 463,440	$ (388,674)	$ (268)	$ (2,741)	$ 71,801
Balance, beginning (in shares) at Dec. 31, 2011	34,046,000				(200,000)
Net loss			(23,806)			(23,806)
Other comprehensive income				8		8
Compensation expenses for share-based payment arrangements		4,796				4,796
Forfeitures of restricted stock						0
Forfeitures of restricted stock (in shares)	(2,000)
Exercise of stock options		172				172
Exercise of stock options (in shares)	33,000
Balance, ending at Jun. 30, 2012	44	468,408	(412,480)	(260)	(2,741)	52,971
Balance, ending (in shares) at Jun. 30, 2012	34,077,000				(200,000)
Balance, beginning at Dec. 31, 2012	61	493,613	(424,105)	(260)	(2,741)	66,568
Balance, beginning (in shares) at Dec. 31, 2012	46,765,000				(200,000)
Net loss			(23,521)			(23,521)
Other comprehensive income				68		68
Compensation expenses for share-based payment arrangements		2,099				2,099
Acquisition of subsidiary, net of issuance costs	6	11,214				11,220
Stock Issued During Period, Shares, Acquisitions	4,472,000
Sale of common stock in public offering, net of underwriting discounts and commissions ($2,244) and offering expenses ($314)	11	34,832				34,843
Public Offering shares issued	8,500,000
Exercise of stock options		3				3
Exercise of stock options (in shares)	1,000
Balance, ending at Jun. 30, 2013	$ 78	$ 541,761	$ (447,626)	$ (192)	$ (2,741)	$ 91,280
Balance, ending (in shares) at Jun. 30, 2013	59,738,000				(200,000)