Note 21 - Condensed Financial Statements of Parent Company - Balance Sheets (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 4,496,465	$ 6,374,457
Prepaid and other assets	1,137,090	815,950
TOTAL ASSETS	393,739,355	383,277,907
Liabilities
Total liabilities	348,656,116	336,855,173
Stockholders’ equity
Preferred stock, $0.01 par value, 50,000,000 authorized, none issued and outstanding
Common stock, $0.01 par value, 100,000,000 authorized, 3,208,618 and 3,374,565 issued and outstanding.	32,086	33,746
Additional paid-in capital	23,168,176	25,500,873
Retained earnings	23,157,134	22,928,777
Accumulated other comprehensive income (loss), net of tax	307,255	(396,148)
Unearned employee stock ownership plan (ESOP) shares	(1,581,412)	(1,644,514)
Total stockholders’ equity	45,083,239	46,422,734	$ 50,970,689
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	393,739,355	383,277,907
Parent Company [Member]
ASSETS
Cash and due from banks	1,960,863	4,993,568
Investment in wholly owned subsidiary	40,934,500	39,044,001
ESOP note receivable	1,672,606	1,700,795
Prepaid and other assets	520,270	684,370
TOTAL ASSETS	45,088,239	46,422,734
Liabilities
Accounts payable	5,000
Total liabilities	5,000
Stockholders’ equity
Preferred stock, $0.01 par value, 50,000,000 authorized, none issued and outstanding
Common stock, $0.01 par value, 100,000,000 authorized, 3,208,618 and 3,374,565 issued and outstanding.	32,086	33,746
Additional paid-in capital	23,168,176	25,500,873
Retained earnings	23,157,134	22,928,777
Accumulated other comprehensive income (loss), net of tax	307,255	(396,148)
Unearned employee stock ownership plan (ESOP) shares	(1,581,412)	(1,644,514)
Total stockholders’ equity	45,083,239	46,422,734
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 45,088,239	$ 46,422,734