Note 8 - Leases - Future Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finance Leases, 2020	$ 968
Operating Leases, 2020	5,253
Finance Leases, 2021	979
Operating Leases, 2021	3,977
Finance Leases, 2022	989
Operating Leases, 2022	2,889
Finance Leases, 2023	996
Operating Leases, 2023	2,456
Finance Leases, 2024	981
Operating Leases, 2024	1,046
Finance Leases, Thereafter	9,481
Operating Leases, Thereafter	2,085
Finance Leases, Total	14,394
Operating Leases, Total	17,706
Finance Leases, Less present value discount	(8,451)
Operating Leases, Less present value discount	(1,959)
Finance Leases, Lease liability	5,943	$ 251
Accounts Payable and Accrued Liabilities and Other Noncurrent Liabilities [Member]
Operating Leases, Lease liability	$ 15,747