Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Total	IPO [Member]	Common Stock [Member]	Common Stock [Member] IPO [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] IPO [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Dec. 31, 2012	$ (173,105)		$ 179			$ 104,679		$ (279,298)	$ 1,335
Balance, (in shares) at Dec. 31, 2012			17,894,386
Repurchase of common stock	(106)				$ (106)
Repurchase of common stock, shares					(5,037)
Net share option exercise			$ 2			(2)
Net share option exercise, shares			163,406
Net loss	(61,555)							(61,555)
Issuance of common stock	400					400
Issuance of common stock,shares			20,933
Other comprehensive loss	(1,729)								(1,729)
Stock-based compensation	578					578
Balance at Dec. 31, 2013	(235,517)		$ 181		$ (106)	105,655		(340,853)	(394)
Balance, (in shares) at Dec. 31, 2013			18,078,725		(5,037)
Net share option exercise	13					13
Net share option exercise, shares			2,219
Net loss	(3,561)							(3,561)
Other comprehensive loss	(1,236)								(1,236)
Stock-based compensation	1,031					1,031
Balance at Dec. 31, 2014	$ (239,270)		$ 181		$ (106)	106,699		(344,414)	(1,630)
Balance, (in shares) at Dec. 31, 2014			18,080,944		(5,037)
Treasury stock retired					$ 106	(106)
Treasury stock retired, shares					5,037
Net share option exercise, shares	0
Net loss	$ (14,746)							(14,746)
Issuance of common stock		$ 67,177		$ 122			$ 67,055
Issuance of common stock,shares			40,000	12,256,577
Other comprehensive loss	(355)								(355)
Shares withheld to cover taxes	(97)					(97)
Shares withheld to cover taxes,shares			(13,020)
Stock-based compensation	2,002					2,002
Balance at Dec. 31, 2015	$ (185,289)		$ 303			$ 175,553		$ (359,160)	$ (1,985)
Balance, (in shares) at Dec. 31, 2015			30,364,501