Note 8 - Time Deposits (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Time Deposits, at or Above FDIC Insurance Limit	$ 10,700,000	$ 14,100,000
Time Deposits, 250,000 or More, Mature With in One Year	6,400,000	11,900,000
Interest Expense, Time Deposits, 250,000 or More	$ 133,000	$ 82,000