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	$ (16,839)	$ (9,716)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation	180	89
Amortization of marketable securities	42
Stock-based compensation	1,900	885
Non-cash operating lease expense	312	273
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	624	624
Accounts payable	4	48
Accrued expenses and other current liabilities	(1,523)	(1,810)
Lease liability	(307)	(89)
Deferred revenue	(3,384)	(3,474)
Deposits and other assets	(793)
Net cash flows used in operating activities	(19,784)	(13,170)
Cash flows from investing activities
Purchases of property and equipment	(33)	(839)
Purchase of marketable securities	(166,018)
Net cash flows used in investing activities	(166,051)	(839)
Cash flows from financing activities
Proceeds from initial public offering, net of offering costs		132,432
Payment of preferred issuance costs		(146)
Proceeds from exercise of stock options	495	242
Net cash flows provided by financing activities	495	132,528
Net increase (decrease) in cash and cash equivalents and restricted cash	(185,340)	118,519
Cash, cash equivalents and restricted cash, beginning of period	233,089	163,363
Cash, cash equivalents and restricted cash, end of period	47,749	281,882
Cash and cash equivalents	46,877	281,010
Restricted cash included in other assets	872	872
Cash, cash equivalents and restricted cash, end of period	$ 47,749	281,882
Supplemental disclosure of non-cash activities
Purchases of property and equipment in accrued expense		157
Right-of-use assets and lease liabilities recognized upon lease inception		7,541
Deferred transaction costs in accounts payable and accrued expenses		$ 1,130