Note 13 - Leases - Total Lease Cost by Type (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)		Sep. 30, 2019 USD ($)
Operating lease cost	$ 1,085	[1]	$ 3,281	[1]
Amortization of leased assets	85		236
Interest on lease liabilities	10		27
Net lease cost	1,180		3,544
Operating cash flows from operating leases			2,195
Operating cash flows from finance leases			77
Financing cash flows from finance leases			201
Leased assets obtained in exchange for new operating lease liabilities			1,714
Leased assets obtained in exchange for new finance lease liabilities			$ 520
Operating leases, weighted-average remaining lease term (Year)	9 years 255 days		9 years 255 days
Finance leases, weighted-average remaining lease term (Year)	2 years 292 days		2 years 292 days
Operating leases, weighted-average discount rate	5.78%		5.78%
Finance leases, weighted-average discount rate	4.83%		4.83%

[1] Includes short-term and variable lease costs, which are immaterial.