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Note J - Leases (Details Textual)
3 Months Ended
Mar. 31, 2022
Lessee, Lease, Option to Extend, Maximum Term (Year) 5 years
Lessee, Lease, Option to Terminate, Term (Year) 1 year
Minimum [Member]  
Lessee, Lease, Remaining Term of Contract (Year) 1 year
Maximum [Member]  
Lessee, Lease, Remaining Term of Contract (Year) 4 years