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Note 16 - Leases (Details Textual) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2023 | Jun. 30, 2024 USD ($)
Number of Additional Operating Leases | 3 |
Operating Lease, Right-of-Use Asset |  | $ 339,022
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] |  | Other Assets, Miscellaneous, Noncurrent
Operating Lease, Liability, Current |  | $ 31,366
Operating Lease, Liability, Noncurrent |  | $ 317,482
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] |  | Other Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] |  | Liabilities, Other than Long-Term Debt, Noncurrent
Three Other Operating Leases [Member] |  |
Operating Lease, Cost |  | $ 50,000
Minimum [Member] |  |
Lessee, Operating Lease, Term of Contract (Year) | 3 years |
Maximum [Member] |  |
Lessee, Operating Lease, Term of Contract (Year) | 6 years |
RNG [Member] |  |
Lessee, Operating Lease, Term of Contract (Year) | 20 years |
Lessee, Operating Lease, Renewal Term (Year) | 5 years |

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- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. + 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 (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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