UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net Loss	$ (4,967)	$ (8,400)	$ (12,128)	$ (16,152)
Unrealized Gain (Loss) on Available-for-Sale Debt Instrument Investments	0	(1)	0	(8)
Foreign Currency Translation Adjustments	(2)	0	(3)	3
Comprehensive Loss	$ (4,969)	$ (8,401)	$ (12,131)	$ (16,157)