Consolidated Balance Sheets (Parentheticals) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Allowance for loan losses	$ 2,472,446	$ 2,247,449
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	3,451,802	3,467,402