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, 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			(9,313)			(9,313)
Compensation expenses for share-based payment arrangements		773				773
Sale of common stock in public offering, net of underwriting discounts and commissions and offering expenses	12	37,443				37,455
Public Offering shares issued	8,750,000					8,750,000
Balance, ending at Mar. 31, 2014	91	586,726	(475,990)	(192)	(2,741)	107,894
Balance, ending (in shares) at Mar. 31, 2014	69,775,000				(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			(10,254)			(10,254)
Compensation expenses for share-based payment arrangements		757				757
Exercise of stock options		61				61
Exercise of stock options (in shares)	12,000
Balance, ending at Mar. 31, 2015	$ 91	$ 590,644	$ (472,521)	$ 0	$ (2,741)	$ 115,473
Balance, ending (in shares) at Mar. 31, 2015	69,845,000				(200,000)