CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net loss	$ (68,899)	$ (43,337)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation expense	1,434	605
Non-cash lease expense	3,017	782
Stock-based compensation	4,315	1,342
Other	174
Changes in operating assets and liabilities:
Operating lease liability	(2,559)	393
Prepaid expenses and other current assets	(6,363)	606
Accounts payable and accrued expenses	405	5,820
Other assets	(668)	(2,503)
Net cash used in operating activities	(69,144)	(36,292)
Cash flow from investing activities
Purchases of investments	(87,757)
Purchases of property and equipment	(3,894)	(4,161)
Net cash used in investing activities	(91,651)	(4,161)
Cash flow from financing activities
Proceeds from issuance of redeemable convertible preferred stock	45,375	82,267
Proceeds from the issuance of common stock upon closing of initial public offering, net of underwriter fees	189,198
Payment of initial public offering costs	(2,215)
Proceeds from stock option exercises	553	259
Net cash provided by financing activities	232,911	82,526
Net increase in cash, cash equivalents and restricted cash equivalents	72,116	42,073
Cash, cash equivalents and restricted cash equivalents, beginning of period	50,098	8,025
Cash, cash equivalents and restricted cash equivalents, end of period	122,214	50,098
Supplemental disclosure of non-cash activities
Operating right-of-use assets and operating lease liability recorded upon lease commencement	35	17,899
Purchases of property and equipment in accounts payable	194	444
Conversion of redeemable convertible preferred stock to common stock upon closing of the initial public offering	$ 152,711
Deferred offering costs in accounts payable and accrued expenses		$ 896