STATEMENTS OF CHANGES IN PREFERRED STOCK AND STOCKHOLDERS' DEFICIT - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid In Capital Common Stock	Accumulated Deficit	Series 1 Preferred Stock - Mezzanine
Balance at Dec. 31, 2017	$ (96,806)	$ 143	$ 615,493	$ (712,442)	$ 143,992
Balance (in shares) at Dec. 31, 2017		142,658,037			119,644
Adjustment for implementation of ASU No. 2014-09, Revenue from Contracts with Customers	(8,131)			(8,131)
Stock-based compensation	3,659		3,659
Cancelled restricted common stock	0	$ 0	0	0	$ 0
Cancelled restricted common stock (shares)		(70,867)
Repurchase of restricted common stock	(731)	$ (1)	(730)
Repurchase of restricted common stock (shares)		(188,234)
Preferred stock dividends					$ 5,047
Preferred stock dividends	(5,120)		(5,120)
Preferred stock dividends (shares)					3,624
Net loss	(16,020)			(16,020)
Balance at Mar. 31, 2018	$ (123,149)	$ 142	$ 613,302	$ (736,593)	$ 149,039
Balance (in shares) at Mar. 31, 2018		142,398,936,000			123,268,000