Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Loans receivable, allowance for loans losses	$ 7,009,097	$ 5,742,449
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, authorized (in shares)	10,000,000	10,000,000
Common stock, issued (in shares)	6,875,503	6,875,503
Treasury stock, shares (in shares)	2,453,728	2,465,476