Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2017	$ 112	$ 255,294	$ (259,121)	$ (3,715)
Balance (in Shares) at Dec. 31, 2017	11,157,489
Issuance of shares upon private placement, net of issuance costs	$ 81	6,353		6,434
Issuance of shares upon private placement, net of issuance costs (in Shares)	8,120,056
Beneficial conversion feature discounts associated with 2018 Note		1,007		1,007
Relative fair value of warrant issued with 2018 Note		743		743
Stock-based compensation expense		124		124
Net loss			(8,038)	(8,038)
Balance at Dec. 31, 2018	$ 193	263,521	(267,159)	(3,445)
Balance (in Shares) at Dec. 31, 2018	19,277,545
Reclassification of derivative liabilities to additional paid-in capital upon stockholder approval		5,785		5,785
Issuance of common stock upon conversion of notes payable to related party	$ 91	5,913		6,004
Issuance of common stock upon conversion of notes payable to related party (in Shares)	9,072,197
Issuance of common stock upon exercise of related party warrants	$ 82	5,321		5,403
Issuance of common stock upon exercise of related party warrants (in Shares)	8,248,549
Stock-based compensation expense		388		388
Net loss			(17,333)	(17,333)
Balance at Dec. 31, 2019	$ 366	$ 280,928	$ (284,492)	$ (3,198)
Balance (in Shares) at Dec. 31, 2019	36,598,291