Note 10 - Leases (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating Lease, Expense	$ 2,600	$ 2,900	$ 5,200	$ 5,800
Operating Lease, Payments	$ 2,500	$ 2,400	4,900	$ 4,600
Operating Lease, Impairment Loss			$ 187