Unaudited Condensed Consolidated Statement of Changes in Stockholders' Deficit - 6 months ended Jun. 30, 2018 - 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 deficit
Beginning Balance at Dec. 31, 2017	$ (95,914)	$ 4			$ 526,147	$ (622,065)
Beginning Balance, Shares at Dec. 31, 2017		380,000	4,166,991	2,340,353
Net loss	(5,367)					(5,367)
Issuance of Class A common stock, Shares			50,000
Stock-based compensation	33				33
Ending Balance at Jun. 30, 2018	$ (101,248)	$ 4			$ 526,180	$ (627,432)
Ending Balance, Shares at Jun. 30, 2018		380,000	4,216,991	2,340,353