Note 9 - Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Operating Lease, Right-of-Use Asset	$ 1,853	$ 1,828
Current portion of operating leases liability	344	702
Operating leases liability, net of current portion	1,630	$ 1,256
Total operating leases liabilities	$ 1,974
Weighted Average Remaining Lease Term (in years) (Year)	6 years 54 days
Weighted Average Discount Rate	8.50%