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Note 3 - Supplemental Balance Sheet Information (in Thousands) - Annual Amortization Expense (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
2022 $ 472  
2023 333  
2024 272  
2025 186  
2026 186  
Thereafter 846  
Total $ 2,295 $ 2,255