Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
REVENUES	$ 608	$ 544
OPERATING EXPENSES
Research and development	5,351	5,462
Sales, marketing and administration	4,077	3,139
TOTAL OPERATING EXPENSES	9,428	8,601
NET OPERATING LOSS	(8,820)	(8,057)
OTHER INCOME (EXPENSE)
Interest and investment income (expense)	(3)	57
Other expense	0	(4)
TOTAL OTHER INCOME (EXPENSE), NET	(3)	53
LOSS BEFORE INCOME TAXES	(8,823)	(8,004)
Provision for income taxes	0	1
NET LOSS	(8,823)	(8,005)
Foreign currency translation adjustment, net of tax	(62)	9
COMPREHENSIVE LOSS	$ (8,885)	$ (7,996)
NET LOSS PER SHARE - BASIC (in dollars per share)	$ (0.15)	$ (0.18)
NET LOSS PER SHARE - DILUTED (in dollars per share)	$ (0.15)	$ (0.18)
Weighted average shares outstanding — basic (in shares)	59,775,674	43,833,127
Weighted average shares outstanding — diluted (in shares)	59,775,674	43,833,127