Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net loss	$ (100,606)	$ (7,325)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	4
Change in fair value of preferred stock tranche rights liability and preferred stock warrant liability	81,157	(586)
Stock-based compensation expense	922	154
Amortization of premiums and accretion of discounts on marketable securities, net	155
Other non-cash expense	109
Changes in operating assets and liabilities:
Grant receivable		(79)
Prepaid expenses and other current assets	(3,881)	53
Other assets	(14)	144
Accounts payable	557	308
Accrued expenses and other current liabilities	3,636	(119)
Net cash used in operating activities	(17,961)	(7,450)
Cash flows from investing activities
Purchases of available-for-sale marketable securities	(104,080)
Purchases of property and equipment	(40)
Net cash used in investing activities	(104,120)
Cash flows from financing activities
Proceeds from issuance of Series B milestone shares, net of issuance costs	30,031
Proceeds from issuance of convertible preferred stock, net of issuance costs		44,675
Proceeds from issuance of common stock upon initial public offering, net of issuance costs	168,556
Proceeds from stock option exercises	15
Net cash provided by financing activities	200,466	44,675
Net change in cash and cash equivalents	78,385	37,225
Cash and cash equivalents at the beginning of the period	43,777	6,552
Cash and cash equivalents at the end of the period	122,162	43,777
Supplemental disclosure of cash flow information
Cash paid for income taxes	0	0
Cash paid for interest	0	0
Supplemental disclosure of noncash financing activities
Reclassification of preferred stock tranche rights liability upon share issuance	81,190	0
Reclassification Of Warrant Liability Upon Exercise Of Preferred Stock Warrant	5,380	0
Conversion of convertible preferred stock into common stock upon IPO	174,504	$ 0
Series A -1 Convertible Preferred Stock Warrant Liability [Member]
Cash flows from financing activities
Proceeds from exercise of warrants	1,250
Common Stock Warrants [Member]
Cash flows from financing activities
Proceeds from exercise of warrants	$ 614