STATEMENTS OF STOCKHOLDERS' DEFICIT - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital Common Stock	Accumulated Deficit	Series 1 Preferred Stock - Mezzanine
Beginning Balance (in shares) at Dec. 31, 2016		132,376,670			106,184
Beginning Balance at Dec. 31, 2016	$ (77,298)	$ 132	$ 580,567	$ (657,997)	$ 125,321
Exercise of employee stock options (in shares)	5,000	5,000
Exercise of employee stock options	$ 29		29
Stock-based compensation	2,024		2,024
Preferred stock dividends (in shares)					3,216
Preferred stock dividends	(4,171)		(4,171)		$ 4,121
Net loss	(15,487)			(15,487)
Ending Balance (in shares) at Mar. 31, 2017		132,381,670			109,400
Ending Balance at Mar. 31, 2017	(94,903)	$ 132	578,571	(673,606)	$ 129,442
Cumulative effect adjustment (Note 2)	$ (122)		$ 122	$ (122)