Note 20 - Condensed Financial Statements of Parent Company - Balance Sheets (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks	$ 6,374,457	$ 4,988,178
Prepaid and other assets	1,057,365	1,294,606
TOTAL ASSETS	383,277,907	336,220,518
Liabilities
Total liabilities	336,855,173	285,249,829
LIABILITIES AND STOCKHOLDERS’ EQUITY
Preferred stock, $0.01 par value, 50,000,000 authorized, 0 issued and outstanding
Common stock, $0.01 par value, 100,000,000 authorized, 3,374,565 and 3,490,672 issued and outstanding.	33,746	34,907
Additional paid-in capital	25,500,873	26,849,822
Retained earnings	22,928,777	26,060,598
Accumulated other comprehensive loss, net of tax	(396,148)	(274,266)
Unearned employee stock ownership plan (ESOP) shares	(1,644,514)	(1,700,372)
Total stockholders’ equity	46,422,734	50,970,689	$ 50,776,577
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	383,277,907	336,220,518
Parent Company [Member]
ASSETS
Cash and due from banks	4,993,568	6,489,288
Investment in wholly owned subsidiary	39,044,001	42,426,774
ESOP note receivable	1,700,795	1,731,494
Prepaid and other assets	684,370	358,962
TOTAL ASSETS	46,422,734	51,006,518
Liabilities
Accounts payable		35,829
Total liabilities		35,829
LIABILITIES AND STOCKHOLDERS’ EQUITY
Preferred stock, $0.01 par value, 50,000,000 authorized, 0 issued and outstanding
Common stock, $0.01 par value, 100,000,000 authorized, 3,374,565 and 3,490,672 issued and outstanding.	33,746	34,907
Additional paid-in capital	25,500,873	26,849,822
Retained earnings	22,928,777	26,060,598
Accumulated other comprehensive loss, net of tax	(396,148)	(274,266)
Unearned employee stock ownership plan (ESOP) shares	(1,644,514)	(1,700,372)
Total stockholders’ equity	46,422,734	50,970,689
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 46,422,734	$ 51,006,518