Note 7 - Leases - Lessee Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
ROU assets	$ 7,936
Other Noncurrent Assets [Member]
ROU assets	7,936
Accrued Liabilities [Member]
Accrued liabilities	2,716
Other Noncurrent Liabilities [Member]
Other liabilities	4,419
Accrued Liabilities and Other Noncurrent Liabilities [Member]
Total lease liability	$ 7,135