Note 13 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating lease assets	$ 9,855	$ 11,425
Current operating lease liabilities	3,272	3,340
Long-term operating lease liabilities	7,586	8,565
Total operating lease liabilities	10,858	11,905
Finance lease assets	2,396	0
Current finance lease liabilities	552	0
Long-term finance lease liabilities	1,919	0
Total finance lease liabilities	$ 2,471	$ 0