Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities
Net loss	$ (37,548)	$ (28,100)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	452	455
Stock-based compensation expense	11,923	3,531
Non-cash operating lease expense	609	244
(Accretion) amortization on short-term investments	(2,584)	272
Changes in operating assets and liabilities:
Accounts receivable	(1,314)	749
Prepaid expenses and other current assets	(476)	1,013
Other non-current assets	0	207
Accounts payable	(144)	1,770
Accrued liabilities	(538)	(364)
Operating lease liabilities	(656)	(275)
Net cash used in operating activities	(30,276)	(20,498)
Cash flows from investing activities
Purchase of short-term investments	(276,620)	(39,228)
Maturity of short-term investments	102,575	41,403
Purchase of property and equipment	(163)	(644)
Net cash (used in) provided by investing activities	(174,208)	1,531
Cash flows from financing activities
Proceeds from issuances of common stock under benefit plans	3,661	51
Payment of offering costs	(586)	(204)
Proceeds from sale of common stock in a public offering	270,251	0
Net cash provided by (used in) financing activities	273,326	(153)
Net increase (decrease) in cash and cash equivalents	68,842	(19,120)
Cash and cash equivalents at beginning of period	33,685	51,665
Cash and cash equivalents at end of period	102,527	32,545
Supplemental disclosures of cash flow information:
Cash paid for interest	282	0
Supplemental disclosures of noncash investing activities:
Net unrealized gain (loss) on short-term investments	$ 636	$ (749)