Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Net loss	$ (30,187)	$ (42,854)
Other comprehensive income (loss):
Unrealized gain on available-for-sale securities		11
Reclassification of realized gains included in net loss		(83)
Comprehensive loss	$ (30,187)	$ (42,926)