Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Additional Paid-in Capital - Warrants	Accumulated Deficit	Series E Preferred Stock Preferred Stock	Series F Preferred Stock Preferred Stock
Balance at Dec. 31, 2017	$ 448	$ 63	$ 8,414		$ (8,029)
Balance, shares at Dec. 31, 2017		10,521,278
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Series E Preferred Stock, net of fees (in shares)						2,812
Issuance of Series E Preferred Stock, net of fees	12,247		12,247
Warrants issued with Series E Preferred Stock			(31,107)	$ 31,107
Issuance of Series F Preferred Stock, net of fees (in shares)							381
Issuance of Series F Preferred Stock, net of fees	1,644		1,644
Warrants issued with Series F Preferred Stock			(1,493)	1,493
Issuance of Series E Preferred for debt and accounts payable (in shares)						687
Issuance of Series E Preferred for debt and accounts payable	3,438		3,438
Conversion of Series C Preferred to common stock (in shares)		433,334
Conversion of Series C Preferred stock for common stock		$ 3	(3)
Conversion of Series D Preferred stock for common stock (in shares)		25,000
Conversion of Series E Preferred stock for common stock (in shares)		20,000				(2)
Conversion of Series E Preferred stock for common stock	0
Warrants issued for settlement of liability	1,494			1,494
Shares issued for settlement of litigation	251	$ 2	249
Shares issued for settlement of litigation (in shares)		210,084
Shares issued for License Agreement	75		75
Shares issued for License Agreement (in shares)		51,988
Accrued dividend	(1,064)				(1,064)
Share based compensation	1,445		1,445
Cancellation of Series E Preferred Stock (in shares)						(9)
Cancellation of Series E Preferred Stock	(46)		(46)
Repurchase of common stock for settlement, related party	(250)	$ (3)	(247)
Repurchase of common stock for settlement, related party (in shares)		(500,000)
Net loss	(16,755)				(16,755)
Balance at Dec. 31, 2018	2,927	$ 65	(5,384)	34,094	(25,848)
Balance, shares at Dec. 31, 2018		10,761,684				3,488	381
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of Series E Preferred stock for common stock (in shares)		107,846				(10)
Conversion of Series E Preferred stock for common stock	4				4
Dividends	(1,516)				(1,516)
Share based compensation	765		765
Cancellation of Series E Preferred Stock	89		100		(11)
Share based compensation (in shares)							(20)
Net loss	(11,978)				(11,978)
Balance at Dec. 31, 2019	$ (9,887)	$ 65	$ (4,719)	$ 34,094	$ (39,327)
Balance, shares at Dec. 31, 2019		10,869,530				3,478	361