Note 10 - Deposits (Details Textual) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Deposit Liabilities Reclassified as Loans Receivable	$ 379,000	$ 389,000
Interest-bearing Domestic Deposit, Brokered	17,700,000	37,100,000
Time Deposits, $100,000 or More	216,000,000	298,300,000
Time Deposits, at or Above FDIC Insurance Limit	$ 77,300,000	$ 120,400,000