Note 20 - Condensed Financial Statements of Parent Company - Statements of Comprehensive Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Noninterest expense
Income before income taxes	$ 1,489,213	$ 2,329,019
Provision for income taxes	415,699	1,968,428
Net income	1,073,514	360,591
Other comprehensive income
Unrealized income (loss) on available-for-sale securities	(166,103)	89,171
COMPREHENSIVE INCOME	907,411	449,762
Parent Company [Member]
Interest income on ESOP note receivable	77,917	66,111
Noninterest income
Equity in income of subsidiary	1,100,091	643,113
Noninterest expense
Professional fees and other	121,957	193,828
Income before income taxes	1,056,051	515,396
Provision for income taxes	(17,463)	154,805
Net income	1,073,514	360,591
Other comprehensive income
Unrealized income (loss) on available-for-sale securities	(121,882)	89,171
COMPREHENSIVE INCOME	$ 951,632	$ 449,762