Note 21 - Condensed Financial Statements of Parent Company - Statements of Comprehensive Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Noninterest expense
Income from continuing operations before provision for income taxes	$ 2,632,060	$ 2,549,967
Provision for income taxes	665,953	674,712
Net income	710,179	1,073,514
Other comprehensive income
Unrealized income (loss) on available-for-sale securities	703,403	(166,103)
COMPREHENSIVE INCOME	1,413,582	907,411
Parent Company [Member]
Interest income on ESOP note receivable	93,544	77,917
Noninterest income
Equity in income of subsidiary	795,761	1,100,091
Noninterest expense
Professional fees and other	175,833	121,957
Income from continuing operations before provision for income taxes	713,472	1,056,051
Provision for income taxes	3,293	(17,463)
Net income	710,179	1,073,514
Other comprehensive income
Unrealized income (loss) on available-for-sale securities	703,403	(121,882)
COMPREHENSIVE INCOME	$ 1,413,582	$ 951,632