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Note 5 - Financial Instruments and Fair Value Measurements - Schedule of Recurring Fair Value Measurements (Details) - Derivative Financial Instruments, Liabilities [Member] - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Balance $ 292 $ 0
Issuances 0 320
Adjustment for net change in fair value (80) (28)
Balance $ 212 $ 292