Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
REVENUES	$ 544	$ 134
OPERATING EXPENSES
Research and development	5,462	4,386
Sales, marketing and administration	3,139	2,985
TOTAL OPERATING EXPENSES	8,601	7,371
NET OPERATING LOSS	(8,057)	(7,237)
OTHER INCOME (EXPENSE)
Interest and investment income	57	106
Other expense	(4)	(5)
TOTAL OTHER INCOME, NET	53	101
LOSS BEFORE INCOME TAXES	(8,004)	(7,136)
Provision for income taxes	1	1
NET LOSS	(8,005)	(7,137)
Foreign currency translation adjustment, net of tax	9	(10)
COMPREHENSIVE LOSS	$ (7,996)	$ (7,147)
NET LOSS PER SHARE - BASIC AND DILUTED (in dollars per share)	$ (0.18)	$ (0.26)
Weighted average shares outstanding-basic and diluted (in shares)	43,833,127	27,547,931