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Note 5 - Investment in Foreign Joint Venture - Summary of Equity Method Investment (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Total current assets $ 19,389           $ 19,389   $ 17,473  
Total assets 87,138           87,138   85,584  
Total liabilities 20,443           20,443   18,576  
Total joint ventures’ equity 66,695 $ 65,482 $ 65,911 $ 65,355 $ 63,676 $ 63,189 66,695 $ 65,355 67,008 $ 61,812
Total liabilities and equity 87,138           87,138   85,584  
Net income 1,119 $ (613) $ (1,598) 997 $ 27 $ 1,469 (1,092) 2,493    
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]                    
Total current assets 108,026           108,026   124,253  
Total non-current assets 4,719           4,719   9,496  
Total assets 112,745           112,745   133,749  
Total liabilities 82,004           82,004   101,562  
Total joint ventures’ equity 30,741           30,741   32,187  
Total liabilities and equity 112,745           112,745   $ 133,749  
Revenues 16,059     34,330     67,257 73,631    
Gross profit 2,607     4,056     7,590 9,122    
Net income $ 724     $ 1,355     $ 1,904 $ 2,662