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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Operating activities:    
Net loss $ (511) $ (730)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 7 7
Amortization of right of use lease asset 10 9
Unrealized gain on marketable equity securities (385) (8)
Unrealized loss on derivative instruments 206 0
Stock-based compensation expense 126 59
Changes in operating assets and liabilities:    
Prepaid expenses and other   68
Accounts payable and other current liabilities (51) (396)
Net cash used in operating activities (598) (991)
Investing activities:    
Sale of short-term investments, net 550 918
Net cash provided by investing activities 550 918
Financing activities:    
Issuance of common stock upon exercise of stock options 156 14
Net cash provided by financing activities 156 14
Net (decrease) increase in cash and cash equivalents 108 (59)
Cash and cash equivalents, beginning of period 81 200
Cash and cash equivalents, end of period $ 189 $ 141