Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities
Net loss	$ (33,051)	$ (60,492)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	1,545	1,772
Depreciation and amortization	363	216
Non-cash lease expense	409	143
Changes in operating assets and liabilities:
Accounts receivable	(2,417)	471
Inventory	(3,499)	0
Prepaid expenses and other current assets	(3,748)	(342)
Prepaid research and development	0	(6,803)
Other long-term assets	981	(981)
Accounts payable	141	5,821
Accrued expenses and other liabilities	(4,463)	24,283
Lease liabilities	(19)	(179)
Net cash used in operating activities	(43,758)	(22,485)
Investing activities
Purchase of property and equipment	(507)	(698)
Net cash used in investing activities	(507)	(698)
Financing activities
Proceeds from initial public offering, net of issuance costs	0	233,348
Proceeds from stock option exercises	98	131
Proceeds from stock option issuances pursuant to employee stock purchase plan	216	0
Net cash provided by financing activities	314	233,479
Net increase (decrease) in cash, cash equivalents and restricted cash	(43,951)	210,296
Cash, cash equivalents and restricted cash at beginning of period	233,312	173,133
Cash, cash equivalents and restricted cash at end of period	189,361	383,429
Supplemental disclosure of noncash investing and financing activities
Property and equipment purchases included in accounts payable and accrued expenses	94	117
Deferred initial public offering costs included in accounts payable and accrued expenses	0	802
Remeasurement of operating lease right-of-use asset for lease modification	$ 285	$ 0