CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL DEFICIENCY - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Beginning balance	$ (30,881)	$ (59,855)	$ (70,322)	$ (52,881)
Share-based compensation	267	113	698	403
Issuance of common stock and warrants, net of issuance cost			41,343
Note receivable from issuance of common stock and warrants			(4,000)
Net loss for the period	(4,150)	(7,743)	(2,483)	(15,007)
Ending balance	(34,764)	(67,485)	(34,764)	(67,485)
Common Stock [Member]
Beginning balance	$ 33	$ 15	$ 15	$ 15
Beginning balance (in shares)	32,442,636	14,838,213	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	$ 33	$ 15
Ending balance (in shares)	32,442,636	14,838,213	32,442,636	14,838,213
Additional Paid-in Capital [Member]
Beginning balance	$ 308,248	$ 269,947	$ 270,492	$ 269,657
Share-based compensation	267	113	698	403
Issuance of common stock and warrants, net of issuance cost			41,325
Note receivable from issuance of common stock and warrants			(4,000)
Ending balance	308,515	270,060	308,515	270,060
Accumulated Deficit [Member]
Beginning balance	(339,162)	(329,817)	(340,829)	(322,553)
Net loss for the period	(4,150)	(7,743)	(2,483)	(15,007)
Ending balance	$ (343,312)	$ (337,560)	$ (343,312)	$ (337,560)