CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (44,850)	$ (18,281)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	856	451
Stock‑based compensation expense	4,306	490
Amortization of premiums and discounts on marketable securities, net	287	0
(Gain) loss on disposal of property and equipment	(3)	0
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(2,508)	215
Right-of-use assets, operating leases	3,587	0
Other non-current assets	(3)	14
Accounts payable	3,601	231
Accrued expenses and other current liabilities	(800)	73
Operating lease liabilities	(3,473)	0
Deferred rent	0	561
Net cash used in operating activities	(39,000)	(16,246)
Cash flows from investing activities:
Purchases of property and equipment	(1,369)	(2,452)
Purchases of marketable securities	(182,653)	0
Maturities of marketable securities	26,714	0
Net cash used in investing activities	(157,308)	(2,452)
Cash flows from financing activities:
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs	0	115,831
Proceeds from exercise of stock options	61	241
Proceeds from the early exercise of stock options	0	528
Net cash provided by financing activities	61	116,600
Net increase (decrease) in cash, cash equivalents, and restricted cash	(196,247)	97,902
Cash, cash equivalents, and restricted cash at beginning of period	291,064	39,045
Cash, cash equivalents, and restricted cash at end of period	94,817	136,947
Supplemental cash flow disclosures:
Deferred financing costs in accounts payable and accrued expenses	0	264
Purchases of property and equipment included in accounts payable and accrued expenses	667	369
Right-of-use assets obtained in exchange for operating lease liabilities	32,991	0
Transfer of deposits for equipment from operating to investing cash flows	495	0
Vesting of options early exercised subject to repurchase	$ 69	$ 26