Note 9 - Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Operating Lease, Right-of-Use Asset	$ 1,598	$ 1,853
Current portion of operating leases liability	357	344
Operating leases liability, net of current portion	1,363	1,630
Total operating leases liabilities	$ 1,720	$ 1,974
Weighted Average Remaining Lease Term (in years) (Year)	5 years 2 months 4 days	6 years 1 month 24 days
Weighted Average Discount Rate	8.50%	8.50%