FAIR VALUE (Schedule of Changes in Fair Value of Liability) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 1,338	$ 1,132
Additions		1,858
Total (gains) losses:
Revaluation recognized in earnings	(13)	(416)
Modification recognized in earnings		1,128
Deductions - warrant liability settlement		(2,364)
Balance at end of period	1,325	1,338
2016 Warrant Liability [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	70	116
Total (gains) losses:
Revaluation recognized in earnings	60	(46)
Balance at end of period	130	70
Bridge Note Warrant Liabilities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	1,268	1,016
Additions		1,858
Total (gains) losses:
Revaluation recognized in earnings	(73)	(370)
Modification recognized in earnings		1,128
Deductions - warrant liability settlement		(2,364)
Balance at end of period	$ 1,195	$ 1,268