Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities
Net loss	$ (17,275)	$ (5,091)
Reconciliation of net loss to net cash used in operating activities:
Stock-based compensation	627	65
Accretion of premium and interest on marketable securities	13
Depreciation expense	4	4
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	960	(347)
Accounts payable	(4,765)	(5,007)
Accrued expenses	6,412	899
Net cash used in operating activities	(14,024)	(9,477)
Investing activities
Purchase of marketable securities	(79,271)
Net cash used in investing activities	(79,271)
Financing activities
Cash paid for issuance costs of convertible preferred stock		(11)
Proceeds from issuance of common stock upon stock option exercises	19
Net cash provided by (used in) financing activities	19	(11)
Decrease in cash and cash equivalents	(93,276)	(9,488)
Cash and cash equivalents, beginning of period	146,284	79,400
Cash and cash equivalents, end of period	$ 53,008	69,912
Supplemental disclosure of non-cash financing activities
Deferred offering costs in accrued expenses		$ 448