CONVERTIBLE NOTES (Bridge Note debt discounts and debt premiums) (Details) - Convertible Debt [Member] - Convertible Bridge Loan - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt discounts
Beginning balance	$ (1,796)	$ (1,111)
Deductions: Amortization/accretion	703	58
Deductions: Write-off related to note conversions	138
Deductions: Write-off related to note extinguishment	955
Ending balance		(1,053)
Debt premiums
Beginning balance		647
Additions:	793
Deductions: Amortization/accretion	(39)	(160)
Deductions: Write-off related to note conversions	(75)	(396)
Ending balance	$ 679	$ 91