STATEMENTS OF STOCKHOLDERS' DEFICIT - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid In Capital Common Stock	Accumulated Deficit	Series 1 Preferred Stock - Mezzanine
Beginning Balance at Dec. 31, 2016	$ (77,298)	$ 132	$ 580,567	$ (657,997)	$ 125,321
Beginning Balance (in shares) at Dec. 31, 2016		132,376,670			106,184
Exercise of employee stock options	$ 99	$ 1	98
Exercise of employee stock options (in shares)	80,000	26,047
Stock-based compensation	$ 6,165		6,165
Restricted stock buy-back at vesting to cover taxes	(1,042)	$ (1)	(1,041)
Restricted stock buy-back at vesting to cover taxes (in shares)		(148,666)
Issuance of common stock, net of commissions and expenses of $2.7 million	47,270	$ 10	47,260
Issuance of common stock net of commissions and expenses of $2.7 million (in shares)		9,708,738
Preferred stock dividends	(13,939)		(13,939)		$ 13,744
Preferred stock dividends (in shares)					9,943
Net loss	(41,050)			(41,050)
Ending Balance at Sep. 30, 2017	$ (79,795)	$ 142	619,232	(699,169)	$ 139,065
Ending Balance (in shares) at Sep. 30, 2017		141,962,789			116,127
Cumulative effect adjustment (Note 3)			$ 122	$ (122)