Note 11 - Leases - Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating cash outflows from operating leases	$ 50	$ 77	$ 184	$ 234
Weighted average remaining lease term in years (Year)	3 years 5 months 4 days	4 years 1 month 9 days	3 years 5 months 4 days	4 years 1 month 9 days
Weighted average discount rate	6.00%	6.00%	6.00%	6.00%