Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Common stock and Paid-In Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Beginning Balance at Dec. 31, 2020	$ 168,919		$ 336,508	$ 25	$ (167,614)
Beginning Balance, Shares at Dec. 31, 2020		33,001,000
Vesting of shares subject to repurchase	5		5
Vesting of shares subject to repurchase, shares		3,000
Exercise of stock options	57		57
Exercise of stock options, shares		13,000
Stock-based compensation	3,406		3,406
Comprehensive loss	(6)			(6)
Net loss	(22,901)				(22,901)
Ending Balance at Mar. 31, 2021	149,480		339,976	19	(190,515)
Ending Balance, Shares at Mar. 31, 2021		33,017,000
Beginning Balance at Dec. 31, 2021	331,944		607,581	(382)	(275,255)
Beginning Balance, Shares at Dec. 31, 2021		47,597,000
Vesting of shares subject to repurchase	2		2
Vesting of shares subject to repurchase, shares		1,000
Exercise of stock options	$ 1,780		1,780
Exercise of stock options, shares	203,047	203,000
Stock-based compensation	$ 5,755		5,755
Comprehensive loss	(1,810)			(1,810)
Net loss	(34,627)				(34,627)
Ending Balance at Mar. 31, 2022	$ 303,044		$ 615,118	$ (2,192)	$ (309,882)
Ending Balance, Shares at Mar. 31, 2022		47,801,000