Note 12 - Income Taxes - Reconciliation for Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Provision at statutory tax rate, amount	$ 1,017	$ 2,173
Provision at statutory tax rate, percent	21.00%	34.00%
Increase (decrease) resulting from:
Tax free gain on bargain purchase, amount		$ (447)
Tax free gain on bargain purchase, percent		(7.00%)
Tax free gain on retirement of CMFP shares, amount	$ (145)
Tax free gain on retirement of CMFP shares, percent	(3.00%)
Tax free interest, net of disallowance, amount	$ (234)	$ (446)
Tax free interest, net of disallowance, percent	(4.80%)	(7.00%)
Earnings on bank-owned life insurance, amount	$ (71)	$ (113)
Earnings on bank-owned life insurance, percent	(1.50%)	(1.80%)
Federal tax rate change, amount		$ 827
Federal tax rate change, percent		12.90%
Other, net, amount	$ 66	$ 120
Other, net, percent	1.40%	2.00%
Provision for income taxes	$ 633	$ 2,114
Provision, percent	13.10%	33.10%