CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net Loss	$ (30,890)	$ (34,128)
Unrealized Loss on Available-for-Sale Investments	(3)	(10)
Foreign Currency Translation Adjustments	8	(1)
Comprehensive Loss	$ (30,885)	$ (34,139)