Note 5 - Leasing Arrangements - Future Minimum Lease Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
2020	$ 804
2021	823
2022	209
2023	5
Thereafter
Total minimum future lease payments	1,841
Less imputed interest	(240)
Total	1,601
Current lease liability	645
Lease liability – non-current	956
	$ 1,601