Note 4 - Goodwill and Other Intangible Assets - Goodwill and Other Intangibles (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Goodwill	$ 1,434,982	$ 1,434,982
Gross carrying amount	3,520,000	3,520,000
Accumulated amortization	(1,970,000)	(1,493,000)
Core deposit intangible, net	1,549,910	2,026,910
Remaining balance	$ 2,985,000	$ 3,462,000