Note 6 - Leases - Lease Payments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating cash flows from operating leases	$ 1,759	$ 1,806
Operating cash flows from finance leases	14	3
Financing cash flows from finance leases	57	2
Total cash paid for amounts included in the measurement of lease liabilities	$ 1,830	$ 1,811