Consolidated Statements of Changes in Stockholders' Deficit - USD ($) $ in Thousands	Total	Preferred Stock Series C convertible preferred stock	Common Stock Class A common stock	Common Stock Class B common stock	Additional paid-in capital	Accumulated other comprehensive loss, net	Accumulated deficit
Beginning Balance at Dec. 31, 2014	$ (71,790)	$ 4			$ 525,335	$ (408)	$ (596,721)
Beginning Balance, Shares at Dec. 31, 2014		380,000	4,166,991	2,340,353
Stock-based compensation	9				9
Net loss	(26,955)						(26,955)
Unrealized gain on derivative instrument	188					188
Ending Balance at Dec. 31, 2015	(98,548)	$ 4			525,344	(220)	(623,676)
Ending Balance, Shares at Dec. 31, 2015		380,000	4,166,991	2,340,353
Stock-based compensation	655				655
Net loss	(16,342)						(16,342)
Unrealized gain on derivative instrument	118					118
Ending Balance at Dec. 31, 2016	$ (114,117)	$ 4			$ 525,999	$ (102)	$ (640,018)
Ending Balance, Shares at Dec. 31, 2016		380,000	4,166,991	2,340,353