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Note 4 - Intangible Assets - Estimated Aggregate Future Amortization Expense (Details) - USD ($)
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2003
2024 $ 2,883    
2025     $ 2,466
2026 1,980    
2027 1,725    
Thereafter 2,384    
Finite-Lived Intangible Assets, Net $ 13,163 $ 16,043