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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Cash flows from operating activities    
Net income (loss) $ (38) $ 5
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities    
Depreciation, depletion and amortization 7 7
Changes in assets and liabilities:    
Interest receivable 44
Other current assets (38) (28)
Accounts payable and other liabilities 18 (15)
Net cash used in operating activities (7) (31)
Net decrease in cash and cash equivalents (7) (31)
Cash and cash equivalents at beginning of year 363 447
Cash and cash equivalents at end of period $ 356 $ 416