Note 10 - Leases - Lease Information and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Lease liability	$ 2,192
Right-of-use asset	$ 2,190
Weighted average remaining lease term (in years) (Year)	7 years 302 days
Weighted average discount rate	3.19%
Operating lease expense	$ 59
Short-term lease expense	39
Total lease expense	98	75
Cash paid for amounts included in lease liabilities	56
Right-of-use assets obtained in exchange for operating lease liabilities commencing during the period	$ 1,553