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UNAUDITED SUPPLEMENTARY QUARTERLY INFORMATION (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Revenues	$ 701	$ 423	$ 3,071	$ 1,670	$ 3,043	$ 451	$ 26,973	$ 1,254	$ 5,865	$ 31,721	$ 31,046
Gross profit (loss)	(5,567)	(1,923)	(4,521)	(422)	(1,317)	(263)	14,964	(994)	(38,094)	(25,362)	(27,990)
Net income (loss)	$ (9,707)	$ (6,939)	$ (9,314)	$ (12,134)	$ (7,780)	$ (13,897)	$ 7,144	$ (10,829)	$ (37,978)	$ (25,245)	$ (27,766)
Basic and diluted loss per share (in USD per share)	$ (0.10)	$ (0.07)	$ (0.10)	$ (0.13)					$ (0.40)	$ (0.30)	$ (0.39)
Basic Net (loss) income per share (in dollars per share)					$ (0.09)	$ (0.16)	$ 0.09	$ (0.14)
Diluted Net (loss) income per share (in dollars per share)					$ (0.09)	$ (0.16)	$ 0.08	$ (0.14)
Net income (loss) attributable to owners of the Company	$ (9,699)	$ (6,840)	$ (9,312)	$ (12,127)	$ (7,760)	$ (13,812)	$ 7,149	$ (10,822)	$ (38,832)	$ (23,691)	$ (28,785)
Weighted average shares outstanding Basic (in shares)					91,105,260	87,197,294	77,513,180	75,209,456
Weighted average shares outstanding Diluted (in shares)					91,105,260	87,197,294	86,534,484	75,209,456
Loss per common share (in dollars per share)									$ (0.40)	$ (0.30)	$ (0.39)
Weighted average shares outstanding	99,668,611	96,840,539	93,920,953	92,152,844					95,665,367	83,475,400	70,859,107

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