Condensed Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue	$ 0	$ 1,482	$ 1,580	$ 7,720
Operating expenses:
Research and development	(32,339)	(24,606)	(94,614)	(71,822)
General and administrative	(15,346)	(8,823)	(44,074)	(25,698)
Total operating expenses	(47,685)	(33,429)	(138,688)	(97,520)
Loss from operations	(47,685)	(31,947)	(137,108)	(89,800)
Interest and other income (expense), net	6,515	1,633	17,827	2,013
Interest expense	(317)	(301)	(946)	(474)
Net loss	(41,487)	(30,615)	(120,227)	(88,261)
Net loss attributable to common stockholders, basic	(41,487)	(30,615)	(120,227)	(88,261)
Net loss attributable to common stockholders, diluted	$ (41,487)	$ (30,615)	$ (120,227)	$ (88,261)
Earnings Per Share [Abstract]
Net loss per share, attributable to common stockholders- basic (USD per share)	$ (0.70)	$ (0.65)	$ (2.06)	$ (2.22)
Net loss per share, attributable to common stockholders- diluted (USD per share)	$ (0.70)	$ (0.65)	$ (2.06)	$ (2.22)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Shares used in computing net loss per share attributable to common stockholders - basic (in shares)	59,688,451	46,799,058	58,319,608	39,735,342
Shares used in computing net loss per share attributable to common stockholders - diluted (in shares)	59,688,451	46,799,058	58,319,608	39,735,342
Comprehensive loss:
Net loss	$ (41,487)	$ (30,615)	$ (120,227)	$ (88,261)
Net unrealized gain (loss) on short-term investments	334	(1,195)	51	(2,253)
Total other comprehensive gain (loss)	334	(1,195)	51	(2,253)
Comprehensive loss	$ (41,153)	$ (31,810)	$ (120,176)	$ (90,514)