Note 12 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ROU assets	$ 15	$ 59
Long-term lease liability	17,183	$ 15,707
Other Assets [Member]
ROU assets	15
Other Liabilities [Member]
Short-term lease liability	15
Other Noncurrent Liabilities [Member]
Long-term lease liability	$ 0