Condensed Consolidated Statements of Changes in Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning Balance at Dec. 31, 2020	$ 39,945	$ 5	$ 191,348	$ (151,408)
Beginning Balance, Shares at Dec. 31, 2020		51,221
Vesting of share-based awards		92
Stock-based compensation	948		948
Net loss	(7,422)			(7,422)
Ending Balance at Mar. 31, 2021	33,471	$ 5	192,296	(158,830)
Ending Balance, Shares at Mar. 31, 2021		51,313
Beginning Balance at Dec. 31, 2021	140,078	$ 10	373,657	(233,589)
Beginning Balance, Shares at Dec. 31, 2021		100,832
Vesting of share-based awards		73
Stock-based compensation	1,574		1,574
Net loss	(7,162)			(7,162)
Ending Balance at Mar. 31, 2022	$ 134,490	$ 10	$ 375,231	$ (240,751)
Ending Balance, Shares at Mar. 31, 2022		100,905