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Note 12 - Commitments - Lease Expense (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Cash paid for operating lease liabilities | $ 31,882 | $ 31,882
Cash paid for finance lease liabilities | $ 3,417 | $ 2,685
Finance leases (years) (Year) | 4 years 9 months | 9 months 14 days
Operating leases (years) (Year) | 2 years | 3 years
Weighted-average discount rate – operating leases | 9.20% | 9.20%
Weighted-average discount rate – finance leases | 9.20% | 9.20%

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- Definition Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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