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Note 11 - Leases - Future Minimum Commitments (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
2021 $ 19,000  
2022 19,000  
2023 19,000  
2024 19,000  
2025 5,000  
Total lease payments 81,000  
Less imputed interest (4,000)  
Other Liabilities [Member]    
Total $ 77,000 $ 0