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Note 3 - Other Intangible Assets - Estimated Future Annual Amortization Expense (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Total $ 263 $ 422
Finite-lived Intangible Assets, Excluding Projects in Process [Member]    
2024 87  
2025 14  
2026 14  
2027 14  
Thereafter 23  
Total $ 152