CONDENSED STATEMENTS OF OPERATIONS AND 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]
Revenues	$ 18,165	$ 16,288	$ 35,302	$ 32,259
Type of Revenue [Extensible List]	us-gaap:LicenseAndServiceMember	us-gaap:LicenseAndServiceMember	us-gaap:LicenseAndServiceMember	us-gaap:LicenseAndServiceMember
Operating expenses:
Research and development	$ 31,159	$ 26,100	$ 61,718	$ 48,472
General and administrative	11,748	9,393	22,292	18,619
Total operating expenses	42,907	35,493	84,010	67,091
Loss from operations	(24,742)	(19,205)	(48,708)	(34,832)
Interest income	262	44	330	112
Other income (expense), net	296	(82)	309	(77)
Net loss	(24,184)	(19,243)	(48,069)	(34,797)
Other comprehensive loss
Unrealized gain (loss) on investments, net of tax	(243)	58	(920)	62
Comprehensive loss	$ (24,427)	$ (19,185)	$ (48,989)	$ (34,735)
Net loss per share, Basic	$ (0.37)	$ (0.30)	$ (0.73)	$ (0.55)
Net loss per share, Diluted	$ (0.37)	$ (0.30)	$ (0.73)	$ (0.55)
Shares used in computing net loss per share, Basic	65,542,762	65,055,998	65,468,638	63,023,349
Shares used in computing net loss per share, Diluted	65,542,762	65,055,998	65,468,638	63,023,349