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Fair Values of Financial Instruments - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Fair Value Disclosures [Abstract]    
Carrying value of an impaired loan $ 12,286,822 $ 10,243,082
Impaired loans, allowance for loan losses 2,996,708 2,024,754
Fair value adjustment to OREO due to declines or impairment after foreclosure $ 0 $ 694,207