Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
REVENUES	$ 2,178	$ 3,160
OPERATING EXPENSES
Research and development	22,935	19,477
Sales, marketing and administration	15,197	12,150
TOTAL OPERATING EXPENSES	38,132	31,627
NET OPERATING LOSS	(35,954)	(28,467)
OTHER INCOME (EXPENSE)
Interest and investment income	0	66
Interest and other expense	(15)	(12)
TOTAL OTHER INCOME	(15)	54
LOSS BEFORE INCOME TAXES	(35,969)	(28,413)
Provision for income taxes	(1)	(1)
NET LOSS	(35,970)	(28,414)
Foreign currency translation adjustment	(36)	86
COMPREHENSIVE LOSS	$ (36,006)	$ (28,328)
NET LOSS PER SHARE - BASIC (in dollars per share)	$ (0.58)	$ (0.55)
NET LOSS PER SHARE - DILUTED (in dollars per share)	$ (0.58)	$ (0.55)
Weighted average shares outstanding — basic (in shares)	62,480,340	51,254,329
Weighted average shares outstanding — dilute (in shares)	62,480,340	51,254,329