Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Loans receivable, allowance for loan losses	$ 7,846,622	$ 7,995,569
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)	6,912,003	6,902,003
Treasury stock, shares (in shares)	2,428,797	2,443,522