Note E - Leases (Details Textual) - USD ($)	1 Months Ended		9 Months Ended
	Apr. 30, 2024	Oct. 31, 2019	Dec. 31, 2024
Operating Lease, Weighted Average Remaining Lease Term (Year)			19 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent			7.50%
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]
Lessee, Operating Lease, Renewal Term (Year)			5 years
Operating Lease, Monthly Payments			$ 13,000
Administrative Office Space in Woodlands, Texas [Member]
Operating Lease, Monthly Payments			$ 11,000
Operating Lease, Additional Term (Month)			60 months
Office Space in Longview, Texas [Member]
Operating Lease, Monthly Payments	$ 5,000