Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
REVENUES	$ 134	$ 157
OPERATING EXPENSES
Research and development	4,386	3,254
Sales, marketing and administration	2,985	2,665
TOTAL OPERATING EXPENSES	7,371	5,919
NET OPERATING LOSS	(7,237)	(5,762)
OTHER INCOME (EXPENSE)
Interest and investment income	106	48
Other expense	(5)	(2)
TOTAL OTHER INCOME, NET	101	46
LOSS BEFORE INCOME TAXES	(7,136)	(5,716)
Provision for income taxes	1	0
NET LOSS	(7,137)	(5,716)
Foreign currency translation adjustment, net of tax	(10)	21
COMPREHENSIVE LOSS	$ (7,147)	$ (5,695)
NET LOSS PER SHARE - BASIC AND DILUTED (in dollars per share)	$ (0.26)	$ (0.28)
Weighted average shares outstanding-basic and diluted (in shares)	27,547,931	20,176,372