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			(35,107)			(35,107)
Other comprehensive income				8		8
Compensation expenses for share-based payment arrangements		5,750				5,750
Forfeitures of restricted stock						0
Forfeitures of restricted stock (in shares)	(6,000)
Exercise of stock options		196				196
Exercise of stock options (in shares)	37,000
Balance, ending at Sep. 30, 2012	44	469,386	(423,781)	(260)	(2,741)	42,648
Balance, ending (in shares) at Sep. 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			(34,021)			(34,021)
Other comprehensive income				68		68
Compensation expenses for share-based payment arrangements		2,903				2,903
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 ($2,581) and offering expenses ($350)	12	40,067				40,079
Public Offering shares issued	9,775,000
Forfeitures of restricted stock						0
Forfeitures of restricted stock (in shares)	(1,000)
Exercise of stock options		71				71
Exercise of stock options (in shares)	14,000
Balance, ending at Sep. 30, 2013	$ 79	$ 547,868	$ (458,126)	$ (192)	$ (2,741)	$ 86,888
Balance, ending (in shares) at Sep. 30, 2013	61,025,000				(200,000)