Note 13 - Leases - Lease Cost and Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Operating lease cost	$ 131	$ 253
Short-term lease cost	21	46
Operating cash flows from operating leases	$ 109	$ 218
Weighted -average remaining lease term - operating leases (in years) (Year)	10 years	10 years
Weighted -average discount rate - operating leases	3.55%	3.55%