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Note 5 - Identified Intangible Assets - Expected Amortization Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
2019 $ 31 $ 33
2021 26  
2022 22  
2023 20  
2024 17  
2025 12  
2026+ $ 20