CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' DEFICIT - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Balance at Dec. 31, 2017	$ 208	$ 380,145	$ (380,380)	$ (27)
Balance (in shares) at Dec. 31, 2017	20,796
Net loss			(3,842)	(3,842)
Net distribution of common stock pursuant to restricted stock unit award plan	$ 2	32		34
Net distribution of common stock pursuant to restricted stock unit award plan (in shares)	238
Non-cash share-based compensation		218		218
Balance at Dec. 31, 2018	$ 210	380,395	(384,222)	(3,617)
Balance (in shares) at Dec. 31, 2018	21,034
Net loss			(3,774)	(3,774)
Net distribution of common stock pursuant to restricted stock unit award plan	$ 3	12		15
Net distribution of common stock pursuant to restricted stock unit award plan (in shares)	266
Non-cash share-based compensation		108		108
Debt premium from debt modification		1,382		1,382
Issuance of warrant		1,145		1,145
Balance at Dec. 31, 2019	$ 213	$ 383,042	$ (387,996)	$ (4,741)
Balance (in shares) at Dec. 31, 2019	21,300