Note 9 - Leases - Components of Operating Lease Expense (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2019	Sep. 30, 2019
Operating lease cost	[1]	$ 1,841	$ 5,811
Less: Sublease income (Note 20)		(37)	(112)
Net lease cost		$ 1,804	$ 5,699

[1] Includes variable lease costs, which are immaterial.