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Note 4 - Long-term Debt, Net - Long-term Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Long-term debt $ 26,041 $ 35,579
Less: Current portion of long-term debt (22,165) (31,609)
Long-term debt, net (non-current) 3,876 3,970
New Credit Facility [Member]    
Long-term debt 21,415 30,359
Notes Payable to Banks [Member]    
Long-term debt 750 1,500
Convertible Debt [Member]    
Long-term debt $ 3,876 $ 3,720