Note 9 - Earnings Per Share - Calculation of Diluted Weighted-average Shares Outstanding (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income from continuing operations		$ 452,384	$ 543,942	$ 1,352,259	$ 1,585,265
Net loss from discontinued operations			(401,700)	(1,198,445)	(692,835)
Less: Earnings (loss) allocated to participating securities	[1]	(7,082)	(3,313)	(2,466)	(21,681)
Net income allocated to common shareholders		$ 445,302	$ 138,929	$ 151,348	$ 870,749
Weighted-average common shares outstanding including participating securities (in shares)		3,271,001	3,404,065	3,328,806	3,416,900
Less: Average participating securities (in shares)		(48,544)	(75,179)	(49,069)	(75,083)
Less: Average unallocated ESOP Shares (in shares)		(170,316)	(176,102)	(170,316)	(176,102)
Average shares (in shares)		3,052,141	3,152,784	3,109,421	3,165,715
Earnings per common share - continuing operations (in dollars per share)		$ 0.15	$ 0.17	$ 0.43	$ 0.50
Loss per common share - discontinued operations (in dollars per share)			(0.13)	(0.38)	(0.22)
Earnings per common share - Basic (in dollars per share)		$ 0.15	$ 0.04	$ 0.05	$ 0.28
Net income allocated to common shareholders		$ 445,302	$ 138,929	$ 151,348	$ 870,749
Add: Dilutive effects of assumed exercises of stock options (in shares)		4,095	13,362	3,554	9,480
Weighted average shares and dilutive potential common shares (in shares)		3,056,236	3,166,146	3,112,975	3,175,195
Diluted earnings per common share - continuing operations (in dollars per share)		$ 0.15	$ 0.17	$ 0.43	$ 0.49
Diluted loss per common share - discontinued operations (in dollars per share)			(0.13)	(0.38)	(0.22)
Earnings per common share - Diluted (in dollars per share)		$ 0.15	$ 0.04	$ 0.05	$ 0.27

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