Note 10 - Income Taxes - Reconciliation of Statutory to Effective Rates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Federal income taxes at statutory rate, amount	$ 289	$ 27
Federal income taxes at statutory rate, percentage	21.00%	34.00%
Tax exempt interest on municipal obligations, amount	$ (10)	$ (45)
Tax exempt interest on municipal obligations, percentage	(0.73%)	(57.69%)
State income taxes, net of federal income tax benefit, amount	$ 75	$ 20
State income taxes, net of federal income tax benefit, percentage	5.45%	25.64%
Increase in CSV of life insurance, amount	$ (41)	$ (67)
Increase in CSV of life insurance, percentage	(2.98%)	(85.90%)
Other, amount	$ 5	$ (24)
Other, percentage	0.36%	(30.77%)
Valuation of deferred tax asset, amount		$ 353
Valuation of deferred tax asset, percentage	0.00%	452.56%
Total Provision for Income Taxes	$ 318	$ 264
Provision for income taxes, percentage	23.11%	337.84%