Note 10 - Leases - Lease Information and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Right-of-use asset	$ 2,202		$ 2,277
Weighted average remaining lease term (in years) (Year)	6 years 251 days		6 years 328 days
Weighted average discount rate	3.03%		3.02%
Operating lease expense	$ 93	$ 59
Short-term lease expense	1	39
Total lease expense	94	98
Cash paid for amounts included in lease liabilities	91	56
Right-of-use assets obtained in exchange for operating lease liabilities commencing during the period		$ 1,553
Other Liabilities [Member]
Lease liability	$ 2,214		$ 2,286