Note 7 - Leases - Future Payments of Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Operating Lease, 2019	$ 16,331
Capital Leases, 2019	6,511
Operating Lease, 2020	11,726
Capital Leases, 2020	9,748
Operating Lease, 2021	7,973
Capital Leases, 2021	7,721
Operating Lease, 2022	6,272
Capital Leases, 2022	9,487
Operating Lease, 2023	208
Capital Leases, 2023	9,148
Operating Lease, Thereafter	35
Capital Leases, Thereafter	1,420
Operating Lease, Total minimum lease payments	42,545
Capital Leases, Total minimum lease payments	44,035
Capital Leases, Less: amount representing interest	(3,542)
Capital Leases, Present value of minimum lease payments	40,493
Capital Leases, Less: current portion	(5,374)	$ (2,962)
Capital Leases, Capital lease obligations, long-term	$ 35,119	$ 21,777