Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flow from operating activities:
Net loss	$ (22,963)	$ (9,611)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	2,043	58
Depreciation and amortization expense	15	1
Accretion of discounts and amortization of premiums on investments, net	16
Non-cash interest expense		75
Change in fair value of convertible promissory notes to related party		644
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(6,855)	(103)
Other long-term assets	(302)
Accounts payable	609	37
Accrued and other liabilities	(6)	1,040
Operating lease asset and liability, net	32
Other liabilities	12
Net cash used in operating activities	(27,399)	(7,859)
Cash flow from investing activities:
Purchases of investments	(113,253)
Purchases of property and equipment	(181)
Net cash used in investing activities	(113,434)
Cash flow from financing activities:
Proceeds from sale of Series A redeemable convertible preferred stock, net of issuance costs	63,512	6,413
Proceeds from issuance of convertible promissory notes to related party		2,500
Proceeds from exercise of stock options		5
Proceeds from issuance of common stock, net of issuance costs	126,945
Net cash provided by financing activities	190,457	8,918
Net increase in cash	49,624	1,059
Cash and cash equivalents at the beginning of the year	4,573	3,514
Cash and cash equivalents at the end of the period	54,197	4,573
Supplemental disclosure of noncash investing and financing activities:
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	79,818
Right-of-use asset obtained in exchange for operating lease liability	542
Purchases of property and equipment in accounts payable	21	40
Conversion of convertible promissory notes to related party to Series A redeemable convertible preferred stock		(3,219)
Conversion of convertible promissory notes to related party to Series A redeemable convertible preferred stock		$ (2,500)