Note 11 - Leases (Details Textual) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Buildings and Equipment [Member]
Operating Lease, Right-of-Use Asset	$ 683,000	$ 800,000
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	5 years