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Note 4 - Intangible Assets - Estimated Aggregate Future Amortization Expense (Details) - USD ($)
Dec. 31, 2022
Mar. 31, 2022
2023 $ 721  
2024 2,883  
2025 2,466  
2026 1,980  
2027 1,725  
Thereafter 4,108  
Finite-Lived Intangible Assets, Net, Ending Balance $ 13,883 $ 16,043