Note 17 - Condensed Parent Only Financial Statements - Statements of Operations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income before income tax benefit	$ 2,662,850	$ 2,673,522
Income tax expense	725,503	679,216
Net income	1,937,347	1,994,306
Parent Company [Member]
Equity in net income of subsidiary	1,990,700	2,062,622
Interest income	69,003	68,665
Operating income	2,059,703	2,131,287
Other expenses	143,628	163,798
Income before income tax benefit	1,916,075	1,967,489
Income tax expense	(21,272)	(26,817)
Net income	$ 1,937,347	$ 1,994,306