Note 21 - Related Party Transactions - Loans to Executive Officers and Directors (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Balance, beginning of year	$ 4,030,844	$ 5,797,809	$ 6,528,933
New Loans	1,815,200	500,000	2,795,734
Repayments	(1,489,063)	(2,266,965)	(3,526,858)
Balance, end of year	$ 4,356,981	$ 4,030,844	$ 5,797,809