Note 11 - Leases - Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating cash outflows from operating leases	$ 47	$ 78	$ 134	$ 157
Weighted average remaining lease term in years (Year)	3 years 8 months 1 day	4 years 2 months 8 days	3 years 8 months 1 day	4 years 2 months 8 days
Weighted average discount rate	6.00%	6.00%	6.00%	6.00%