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Note 4 - Leases (Details Textual) - USD ($)
Oct. 04, 2020
Dec. 31, 2019
Lessee, Operating Lease, Renewal Term (Year) 5 years  
Operating Lease, Right-of-Use Asset $ 6,315,000 $ 7,014,000
Operating Lease, Liability, Total $ 7,131,000 $ 7,747,000
Minimum [Member]    
Lessee, Operating Lease, Term of Contract (Year) 10 years  
Maximum [Member]    
Lessee, Operating Lease, Term of Contract (Year) 11 years