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Note 6 - Intangible Assets, Net - Future Amortization Expense (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
2022 (6 months) $ 141  
2023 278  
2024 279  
2025 274  
2026 186  
Thereafter 439  
Total estimated amortization expense $ 1,597 $ 1,638