Note 9 - Time Deposits (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Time Deposits, at or Above FDIC Insurance Limit	$ 12,400,000	$ 10,700,000
Time Deposits, 250,000 or More, Mature With in One Year	10,800,000	6,400,000
Interest Expense, Time Deposits, 250,000 or More	$ 212,000	$ 133,000