Condensed Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net loss	$ (19,280)	$ (88,355)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	10
Change in fair value of preferred stock tranche rights liability and preferred stock warrant liability		81,157
Stock-based compensation expense	1,333	253
Amortization of premiums and accretion of discounts on marketable securities, net	384
Amortization of right-of-use asset	66
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	3,282	(1,108)
Other assets	(92)	(13)
Accounts payable	580	741
Operating lease liability	(66)
Accrued expenses and other current liabilities	(984)	691
Net cash used in operating activities	(14,767)	(6,634)
Cash flows from investing activities
Purchases of marketable securities	(12,129)
Proceeds from maturities and sales of marketable securities	15,860
Purchases of property and equipment	(45)	(6)
Net cash provided by (used in) investing activities	3,686	(6)
Cash flows from financing activities
Proceeds from issuance of Series B milestone shares, net of issuance costs		30,031
Payments for deferred offering costs	(31)	(220)
Proceeds from the exercise of stock options	17
Net cash provided by (used in) financing activities	(14)	31,675
Net change in cash and cash equivalents	(11,095)	25,035
Cash and cash equivalents at the beginning of the period	122,162	43,777
Cash and cash equivalents at the end of the period	111,067	68,812
Supplemental disclosure of cash flow information
Cash paid for income taxes	0	0
Cash paid for interest	0	0
Supplemental disclosure of noncash investing and financing activities
Right-of-use assets obtained in exchange for operating lease liabilities	233
Deferred offering costs in accrued expenses and other current liabilities	207	497
Purchases of property and equipment in accounts payable	42	0
Reclassification of preferred stock tranche rights liability upon share issuance	0	81,190
Reclassification of warrant liability upon exercise of preferred stock warrant		5,380
Deferred offering costs in accounts payable	$ 0	1,635
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