Note 13 - Related Parties - Loans Outstanding to Directors and Executive Officers (Details) - Directors and Executive Officers [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Beginning balance	$ 92,033,000	$ 14,473,000
New loans	16,662,000	79,330,000
Repayments	(4,652,000)	(1,770,000)
Ending balance	$ 104,043,000	$ 92,033,000