CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL DEFICIENCY - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Beginning balance	$ (70,322)	$ (52,881)
Issuance of common stock and warrants, net of issuance cost	41,343
Note receivable from issuance of common stock and warrants	(4,000)
Share-based compensation	431	290
Net income (loss) for the period	1,667	(7,264)
Ending balance	(30,881)	(59,855)
Common Stock [Member]
Beginning balance	$ 15	$ 15
Beginning balance (in shares)	14,838,213	14,838,213
Issuance of common stock and warrants, net of issuance cost	$ 18
Issuance of common stock and warrants, net of issuance cost (in shares)	17,604,423
Ending balance	$ 33	$ 15
Ending balance (in shares)	32,442,636	14,838,213
Additional Paid-in Capital [Member]
Beginning balance	$ 270,492	$ 269,657
Issuance of common stock and warrants, net of issuance cost	41,325
Note receivable from issuance of common stock and warrants	(4,000)
Share-based compensation	431	290
Ending balance	308,248	269,947
Accumulated Deficit [Member]
Beginning balance	(340,829)	(322,553)
Net income (loss) for the period	1,667	(7,264)
Ending balance	$ (339,162)	$ (329,817)