Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash Flows from Operating Activities
Net loss	$ (11,197)	$ (9,948)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	2,095	2,120
Depreciation and amortization	74	106
Amortization of right-of-use assets	178	171
Unrealized (gain) loss from investments	273	(90)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	119	42
Accounts payable, accrued expenses and other current liabilities	907	311
Operating lease liabilities	(182)	(169)
Net cash used in operating activities	(7,733)	(7,457)
Cash Flows from Investing Activities
Maturities of investments	24,835	31,263
Purchase of property and equipment	(5)	(24)
Purchases of investments	(16,807)	(25,068)
Net cash provided by investing activities	8,023	6,171
Cash Flows from Financing Activities
Proceeds from stock option exercises		46
Net cash provided by financing activities		46
Net increase (decrease) in cash and cash equivalents	290	(1,240)
Cash and cash equivalents - Beginning of period	1,754	3,620
Cash and cash equivalents - End of period	$ 2,044	$ 2,380