CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net loss	$ (32,385)	$ (11,281)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	416	207
Noncash operating lease expense	60
Amortization of premiums and discounts on marketable securities	110
Share-based compensation	4,481	757
Changes in operating assets and liabilities:
Prepaid expenses and other current and non-current assets	(8,423)	48
Accounts payable and other current liabilities	696	321
Accrued liabilities	2,563	392
Operating lease liabilities	(104)
Deferred rent		49
Net cash used in operating activities	(32,586)	(9,507)
Cash flows from investing activities
Purchases of property and equipment	(467)	(1,066)
Purchases of marketable securities	(27,026)
Proceeds from maturities of marketable securities	16,850
Net cash used in investing activities	(10,643)	(1,066)
Cash flows from financing activities
Proceeds from issuance of common stock (initial public offering), net of transactions costs	129,156
Proceeds from issuance of common stock (private placement), net of transactions costs	10,000
Proceeds from issuance of Series C redeemable convertible preferred stock, net of transaction costs		81,756
Proceeds from the exercise of stock options	429	7
Payments under finance leases	(29)	(121)
Payments of deferred offering costs		(14)
Net cash provided by financing activities	139,556	81,628
Net increase in cash and cash equivalents and restricted cash	96,327	71,055
Cash and cash equivalents and restricted cash, beginning of the year	31,032	46,795
Cash and cash equivalents and restricted cash, end of the period	127,359	117,850
Supplemental disclosures of noncash investing and financing activities:
Purchase of property and equipment included in accounts payable and accrued liabilities	35	$ 238
Deferred offering costs included in accrued liabilities	$ 42