Consolidated Statements of Stockholders` Equity (Deficit) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balances at Dec. 31, 2016	$ 1		$ 40,758	$ (70,400)	$ (29,641)
Balances (in Shares) at Dec. 31, 2016	1,221,064	135,658
Issuance of common stock upon exercise of stock options			24		$ 24
Issuance of common stock upon exercise of stock options (in Shares)		2,834			2,834
Stock-based compensation			477		$ 477
Net loss				(9,582)	(9,582)
Balances at Dec. 31, 2017	$ 1		41,259	(79,982)	$ (38,722)
Balances (in Shares) at Dec. 31, 2017	1,221,064	138,492			138,492
Issuance of common stock upon conversion of convertible promissory notes, related parties		$ 157	35,420		$ 35,577
Issuance of common stock upon conversion of convertible promissory notes, related parties (in Shares)		1,571,702
Issuance of common stock upon conversion of convertible preferred stock	$ (1)	$ 192	(191)
Issuance of common stock upon conversion of convertible preferred stock (in Shares)	(1,221,064)	1,918,543
Reclassification of warrant to equity			70		70
Issuance of common stock uponreverse merger		$ 365	31,403		31,768
Issuance of common stock uponreverse merger (in Shares)		3,510,439
Issuance of common stock upon exercise of stock options			13		$ 13
Issuance of common stock upon exercise of stock options (in Shares)		2,013			2,013
Stock-based compensation			539		$ 539
Net loss				(18,007)	(18,007)
Balances at Dec. 31, 2018		$ 714	$ 108,513	$ (97,989)	$ 11,238
Balances (in Shares) at Dec. 31, 2018		7,141,189			7,141,189