Note 8 - Leases - Lease Cost and Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Operating lease right-of-use assets	$ 998		$ 1,053
Total operating leases	998		$ 1,053
Operating lease cost	54	$ 66
Short-term lease expense	$ 8	$ 16
Weighted-average remaining lease term for operating leases (in years) (Year)	10 years 109 days		10 years 219 days
Weighted-average discount rate for operating leases	2.77%		2.76%