Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash Flows from Operating Activities
Net loss	$ (9,948)	$ (12,866)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	2,120	2,949
Depreciation and amortization	106	109
Amortization of right of use assets	171	165
Unrealized (gain) loss from investments	(90)	(411)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	42	40
Accounts payable	271	656
Accrued expenses and other current liabilities	40	(157)
Operating lease liabilities	(169)	(157)
Net Cash Used in Operating Activities	(7,457)	(9,672)
Cash Flows from Investing Activities
Maturities of investments	31,263	24,956
Purchase of property and equipment	(24)	(26)
Purchases of investments	(25,068)	(15,099)
Net Cash Provided by Investing Activities	6,171	9,831
Cash Flows from Financing Activities
Proceeds from Stock Option Exercises	46
Net Cash Provided by Financing Activities	46
Net (Decrease) Increase in Cash	(1,240)	159
Cash, cash equivalents - Beginning of period	3,620	4,555
Cash, cash equivalents - End of period	$ 2,380	$ 4,714