Note 10 - Leases (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Operating Lease, Liability, Total	$ 21,401		$ 19,508
Operating Lease, Right-of-Use Asset	19,321	$ 15,980	$ 17,613
Operating Lease, Liability, Current	1,832	1,326
Operating Lease, Liability, Noncurrent	19,569	16,591
Operating Lease, Expense	4,396	4,264
Finance Lease, Expense	829	666
Finance Lease, Right-of-Use Asset, Amortization	619	560
Operating Lease, Right-of-Use Asset, Amortization Expense	291	$ 1,633
Lessee, Operating Lease, Liability, Lease Not yet Commenced	$ 907
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract (Year)	3 years
Minimum [Member]
Lessee, Lease Term of Contract (Year)	3 years
Maximum [Member]
Lessee, Lease Term of Contract (Year)	15 years