Note 11 - Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2019 USD ($)
2019 (excluding the three months ended March 31, 2019), operating leases	$ 5,575
2019 (excluding the three months ended March 31, 2019), finance leases	90
2020, operating leases	7,272
2020, finance leases	120
2021, operating leases	5,568
2021, finance leases	120
2022, operating leases	3,275
2022, finance leases	29
2023, operating leases	3,034
2023, finance leases
Thereafter, operating leases	3,560
Thereafter, finance leases
Total lease payments, operating leases	28,284
Total lease payments, finance leases	359
Less: Imputed interest, operating leases	(3,360)
Less: Imputed interest, finance leases	(24)
Total lease obligation, operating leases	24,924
Total lease obligation, finance leases	$ 335