CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total
Balance, beginning at Dec. 31, 2013	$ 79	$ 548,510	$ (466,677)	$ (192)	$ (2,741)	$ 78,979
Balance, beginning (in shares) at Dec. 31, 2013	61,025,000				(200,000)
Net (loss) income			16,589			16,589
Compensation expenses for share-based payment arrangements		2,875				2,875
Sale of common stock in public offering, net of underwriting discounts and commissions and offering expenses	$ 12	37,447				$ 37,459
Public Offering shares issued	8,750,000					8,750,000
Acquisition of subsidiary escrow shares returned		(82)				$ (82)
Acquisition of subsidiary escrow shares returned - shares	(19,000)
Balance, ending at Sep. 30, 2014	$ 91	588,750	(450,088)	(192)	$ (2,741)	135,820
Balance, ending (in shares) at Sep. 30, 2014	69,756,000				(200,000)
Balance, beginning at Dec. 31, 2014	$ 91	589,826	(462,267)	0	$ (2,741)	124,909
Balance, beginning (in shares) at Dec. 31, 2014	69,833,000				(200,000)
Net (loss) income			(31,965)			(31,965)
Compensation expenses for share-based payment arrangements		2,705				2,705
Exercise of stock options		1,015				1,015
Exercise of stock options (in shares)	173,000
Acquisition of subsidiary escrow shares returned						0
Balance, ending at Sep. 30, 2015	$ 91	$ 593,546	$ (494,232)	$ 0	$ (2,741)	$ 96,664
Balance, ending (in shares) at Sep. 30, 2015	70,006,000				(200,000)