Note 11 - Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Operating Leases
Operating Lease, Right-of-Use Asset	$ 20,110
Other current liabilities	6,247
Operating lease liabilities	18,677
Total operating lease liabilities	24,924
Finance Leases
Other Assets	334
Other current liabilities	106
Other long-term liabilities	229
Total finance leases liabiities	$ 335