Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities
Net loss	$ (78,740)	$ (57,646)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	929	914
Stock-based compensation expense	24,969	6,934
Non-cash operating lease expense	1,236	684
(Accretion) amortization on short-term investments	(6,512)	443
Changes in operating assets and liabilities:
Accounts receivable	403	(2,991)
Prepaid expenses and other current assets	(1,809)	1,907
Accounts payable	738	202
Accrued liabilities	5,087	5,404
Operating lease liabilities	(1,336)	(745)
Net cash used in operating activities	(55,035)	(44,894)
Cash flows from investing activities
Purchase of short-term investments	(411,096)	(78,048)
Maturity of short-term investments	214,676	86,972
Purchase of property and equipment	(766)	(898)
Net cash (used in) provided by investing activities	(197,186)	8,026
Cash flows from financing activities
Proceeds from issuances of common stock under benefit plans	3,995	498
Payment of offering costs	(759)	(75)
Payment of debt issuance costs	0	(150)
Proceeds from term loan	0	10,000
Proceeds from sale of common stock in a public offering	270,251	0
Net cash provided by financing activities	273,487	10,273
Net increase (decrease) in cash and cash equivalents	21,266	(26,595)
Cash and cash equivalents at beginning of period	33,685	51,665
Cash and cash equivalents at end of period	54,951	25,070
Supplemental disclosures of cash flow information:
Cash paid for interest	570	72
Supplemental disclosures of noncash investing and financing activities:
Net unrealized loss on short-term investments	(283)	(1,058)
Purchase of property and equipment in accounts payable and accrued liabilities	10	0
Reclassification of restricted stock awards from liabilities to common stock upon vesting	$ 0	$ 1