Note 9 - Earnings Per Share - Calculation of Diluted Weighted-average Shares Outstanding (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net income from continuing operations		$ 512,732	$ 505,531	$ 899,875	$ 1,041,324
Net loss from discontinued operations		(852,510)	(125,970)	(1,198,445)	(291,136)
Less: Earnings (loss) allocated to participating securities	[1]	5,212	(8,844)	4,768	(17,336)
Net (loss) income allocated to common shareholders		$ (334,566)	$ 370,717	$ (293,802)	$ 732,852
Weighted-average common shares outstanding including participating securities (in shares)		3,355,929	3,402,706	3,358,183	3,423,430
Less: Average participating securities (in shares)		(48,864)	(75,179)	(49,331)	(75,042)
Less: Average unallocated ESOP Shares (in shares)		(170,316)	(176,102)	(170,316)	(176,102)
Average shares (in shares)		3,136,749	3,151,425	3,138,536	3,172,287
Earnings per common share - continuing operations (in dollars per share)		$ 0.16	$ 0.16	$ 0.29	$ 0.32
Loss per common share - discontinued operations (in dollars per share)		(0.27)	(0.04)	(0.38)	(0.09)
(Loss) Earnings per common share - Basic (in dollars per share)		$ (0.11)	$ 0.12	$ (0.09)	$ 0.23
Net (loss) income allocated to common shareholders		$ (334,566)	$ 370,717	$ (293,802)	$ 732,852
Add: Dilutive effects of assumed exercises of stock options (in shares)		4,747	12,788	3,399	11,516
Weighted average shares and dilutive potential common shares (in shares)		3,141,497	3,164,212	3,141,935	3,183,803
Diluted earnings per common share - continuing operations (in dollars per share)		$ 0.16	$ 0.16	$ 0.29	$ 0.32
Diluted loss per common share - discontinued operations (in dollars per share)		(0.27)	(0.04)	(0.38)	(0.09)
(Loss) Earnings per common share - Diluted (in dollars per share)		$ (0.11)	$ 0.12	$ (0.09)	$ 0.23

[1] Our participating securities are restricted stock awards which participate in common stock dividends.