Note 12 - Leases (Details Textual) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2020	Mar. 31, 2019
Lessee, Operating Lease, Renewal Term (Year)	5 years	5 years
Lessee, Operating Lease, Option to Terminate Term (Year)		1 year
Lessee, Operating Lease, Option to Extend, Amount		$ 600
Lessee, Operating Lease, Lease Not yet Commenced, Future Minimum Payments Due	$ 100	100
Increase (Decrease) in Operating Lease, Right-of-Use Asset		$ 875	$ 4,427
Corporate Office Lease [Member]
Increase (Decrease) in Operating Lease, Right-of-Use Asset	300
Increase (Decrease) in Operating Lease Liability	$ 600
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	1 year	1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	20 years	20 years