Note 6 - Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating lease assets	$ 8,998	$ 4,827
Finance lease assets	2,330	2,447
Total leased assets	11,328	7,274
Current operating lease liabilities	688	858
Current finance lease liabilities	660	557
Long-term operating lease liabilities	8,889	4,366
Long term finance lease liabilities	1,152	1,451
Total lease liabilities	$ 11,389	$ 7,232