Note 12 - Related Parties - Loans Outstanding to Directors and Executive Officers (Details) - Directors and Executive Officers [Member] - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Beginning balance	$ 104,043,000	$ 92,033,000
New loans	13,823,000	16,662,000
Repayments	(9,824,000)	(4,652,000)
Ending balance	$ 108,042,000	$ 104,043,000