Note 11 - Leases - Supplemental Cash Flow and Other Information Related to Leases (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,833
Operating cash flows from finance leases	1
Financing cash flows from finance leases	8
Right-of-use assets obtained in exchange for new lease liabilities:
Operating leases	219
Finance leases	$ 238