CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (12,756,000)	$ (7,220,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	125,000	45,000
Stock-based compensation expense	2,646,000	40,000
Non-cash lease expense	191,000	178,000
Net amortization of premiums and accretion of discounts on investments	(1,133,000)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	593,000	(884,000)
Accounts payable	470,000	(95,000)
Accrued expenses and other liabilities	(1,318,000)	(326,000)
Operating lease liabilities	(175,000)	(156,000)
Net cash used in operating activities	(11,357,000)	(8,418,000)
Cash flows from investing activities:
Purchases of short-term and long-term investments	(16,963,000)
Proceeds from maturities of short-term investments	26,315,000
Purchases of property and equipment	(25,000)	(415,000)
Net cash provided by (used in) investing activities	9,327,000	(415,000)
Cash flows from financing activities:
Net decrease in cash, cash equivalents, and restricted cash	(2,030,000)	(8,833,000)
Cash, cash equivalents and restricted cash at beginning of period	29,907,000	99,991,000
Cash, cash equivalents and restricted cash at end of period	27,877,000	91,158,000
Supplemental disclosure of non-cash investing and financing activities:
Purchases of property and equipment included in accounts payable and accrued expenses		378,000
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	27,489,000	90,770,000
Restricted cash	388,000	388,000
Total cash, cash equivalents, and restricted cash	$ 27,877,000	$ 91,158,000