Note 21 - Leases - (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Lease, Expense	$ 2.9	$ 2.5	$ 1.8
Operating Lease, Weighted Average Remaining Lease Term	8 years 109 days
Operating Lease, Weighted Average Discount Rate, Percent	3.10%
Minimum [Member]
Lessee, Operating Lease, Term of Contract	1 year
Maximum [Member]
Lessee, Operating Lease, Term of Contract	10 years