Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net loss	$ (14,172)	$ (29,110)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	306	327
Amortization of right-of-use asset	165	44
Write-off of deferred offering costs	332
Share-based compensation	3,340	3,977
Changes in operating assets and liabilities:
Prepaid expenses and other assets	1,553	5,236
Accounts payable	71	62
Accrued expenses and other current liabilities	(1,452)	(2,471)
Deferred revenue	19,808
Other long-term liabilities	(60)	(72)
Net cash provided by (used in) operating activities	9,891	(22,007)
Cash flows from investing activities:
Purchases of property and equipment	(482)	(176)
Net cash used in investing activities	(482)	(176)
Cash flows from financing activities:
Payment of offering costs	(125)
Prepayments from PIPE transaction recorded as deposit liability	61,000
Proceeds from exercise of stock options		32
Proceeds from issuance of common stock under ATM, net	34
Net cash provided by financing activities	60,909	32
Net increase (decrease) in cash and cash equivalents and restricted cash	70,318	(22,151)
Cash and cash equivalents and restricted cash at beginning of period	20,423	49,329
Cash and cash equivalents and restricted cash at end of period	90,741	$ 27,178
Supplemental disclosures of cash flow information:
Operating lease right-of-use asset and lease liability recorded due to lease extension	226
Issuance of common stock to certain board of directors in lieu of accrued compensation	221
Deferred offering costs in accrued expenses and other current liabilities	5
Property and equipment included in accounts payable	$ 315