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Note 5 - Intangible Assets and Goodwill - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
2023 $ 32,000  
2024 32,000  
2025 32,000  
2026 32,000  
2027 15,000  
Total $ 143,000 $ 175,000