Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities
Net loss	$ (45,988)	$ (61,400)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	1,071	466
Stock-based compensation	7,171	3,437
Change in fair value of convertible promissory notes	0	35,199
Change in fair value of warrant liability	0	2,180
Amortization of premium on short-term investments	1,565	540
Amortization of right-of-use lease assets	1,573	0
Accretion of debt issuance costs	79	160
Changes in operating assets and liabilities:
Inventory	(9,309)	0
Prepaid expenses and other current assets	(1,049)	(5,903)
Other noncurrent assets	(921)	(909)
Accounts payable	1,307	766
Accrued expenses	(222)	217
Other current liabilities	0	(122)
Lease liabilities	(668)	0
Other noncurrent liabilities	0	343
Net cash used in operating activities	(45,391)	(25,026)
Investing activities
Purchases of short-term investments	(65,139)	(122,655)
Sales of short-term investments	15,311	17,045
Maturities of shot-term investments	51,285	5,256
Purchases of property and equipment	(3,077)	(1,473)
Net cash used in investing activities	(1,620)	(101,827)
Financing activities
Proceeds from initial public offering, net of issuance costs	0	238,644
Proceeds from issuance of common stock under equity incentive plans, net of repurchases	(365)	3,494
Proceeds from issuance of common stock under employee stock purchase plan	489	0
Proceeds from issuance of convertible promisorry notes	0	130,500
Net cash provided by financing activities	124	372,638
Net (decrease) increase in cash and cash equivalents and restricted cash	(46,887)	245,785
Cash and cash equivalents and restricted cash, beginning of year	201,736	12,170
Cash and cash equivalents and restricted cash, end of year	154,849	257,955
Supplemental disclosure for cash activities
Interest paid	222	260
Supplemental disclosure for non-cash activities
Initial lease liability recognized upon adoption of ASC 842	7,074	0
Initial lease liability recognized upon lease commencements during the period	43,231	0
Vesting of restricted stock	495	322
Deferred offering costs in accrued expenses	0	1,445
Conversion of preferred stock to common stock	0	69,184
Conversion of convertible promissory notes to common stock	0	165,699
Inventory transferred to property and equipment	104	0
Noncurrent desposit transferred to property and equipment	759	0
Purchase of property and equipment included in accounts payable	$ 362	$ 60