Note 10 - Leases (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Operating and Finance Lease, Renewal Term (Year)	10 years
Operating Lease, Expense	$ 1.5	$ 1.6
Minimum [Member]
Operating and Finance Lease, Remaining Term (Year)	2 years
Maximum [Member]
Operating and Finance Lease, Remaining Term (Year)	15 years