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Note E - Leases (Details Textual) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Oct. 31, 2019 | Sep. 30, 2022 | Sep. 30, 2023
Finance Lease, Liability, to be Paid |  |  | $ 109,000
Operating Lease, Weighted Average Remaining Lease Term (Year) |  |  | 19 years 4 months 24 days
Finance Lease, Weighted Average Remaining Lease Term (Year) |  |  | 1 year
Operating Lease, Weighted Average Discount Rate, Percent |  |  | 2.60%
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 |  |
Granite City, IL Facility [Member] |  |  |
Operating Lease, Quarterly Payments |  |  | $ 19,000
Granite City, IL Facility [Member] | Plateplus Inc. [Member] |  |  |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability |  | $ 1,200,000 |
Office Space in Longview, Texas [Member] |  |  |
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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