CONDENSED CONSOLIDATED STATMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (23,877)	$ (9,236)
Other comprehensive loss:
Unrealized loss on available-for-sale marketable securities arising during holding period, net of tax benefit of $0	(28)	0
Total comprehensive loss	$ (23,905)	$ (9,236)