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Note 5 - Leases (Details Textual) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2024 | Jan. 31, 2024 | Oct. 31, 2019 | Mar. 31, 2024
Finance Lease, Liability, to be Paid |  |  |  | $ 54,000
Operating Lease, Weighted Average Remaining Lease Term (Year) |  |  |  | 20 years 4 months 24 days
Finance Lease, Weighted Average Remaining Lease Term (Year) |  |  |  | 6 months
Operating Lease, Weighted Average Discount Rate, Percent |  |  |  | 7.50%
Finance Lease, Weighted Average Discount Rate, Percent |  |  |  | 1.90%
Heavy-duty Forklift [Member] |  |  |  |
Lessee, Finance Lease, Term of Contract (Year) |  |  | 5 years |
Finance Lease, Liability, to be Paid |  |  | $ 500,000 |
Finance Lease, Monthly Payment |  |  | $ 9,000 |
Office Space in Longview, Texas [Member] |  |  |  |
Lessee, Operating Lease, Renewal Term (Year) |  | 5 years |  |
Operating Lease, Monthly Payments |  | $ 13,000 |  | $ 11,000
Lessee, Operating Lease, Term of Contract (Month) |  |  |  | 60 months
Operating Lease, Additional Term (Month) |  |  |  | 60 months
Office Space in Longview, Texas [Member] | Subsequent Event [Member] |  |  |  |
Lessee, Operating Lease, Renewal Term (Year) | 36 months |  |  |
Operating Lease, Monthly Payments | $ 5,000 |  |  |

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- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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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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