Consolidated Balance Sheets (Parentheticals) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Loans receivable, allowance for loan losses	$ 7,995,569	$ 7,107,418
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)	6,902,003	6,878,503
Treasury stock, shares (in shares)	2,443,522	2,453,728