Carrying Value and Estimated Fair Value of Financial Instruments (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Financial assets
Cash and due from banks	$ 19,112,785	$ 16,040,195
Interest bearing deposits with banks	14,868,718	684,100
Securities held-to-maturity	210,736,949
Securities available-for-sale	200,389,756	398,176,402
Net loans	382,242,913	385,646,132
Financial liabilities
Deposits	695,440,109	654,788,316
Federal Home Loan Bank advances	24,346,302	34,622,359
Securities Sold under Agreement to Repurchase	82,318,447	82,420,781
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets
Cash and due from banks	19,112,785	16,040,195
Interest bearing deposits with banks	14,868,718	684,100
Financial liabilities
Deposits	470,963,425	422,186,092
Securities Sold under Agreement to Repurchase	82,318,447	82,420,781
Significant Other Observable Inputs (Level 2)
Financial assets
Securities held-to-maturity	210,736,949
Securities available-for-sale	197,540,281	395,410,199
Significant Unobservable Inputs (Level 3)
Financial assets
Securities available-for-sale	2,849,475	2,766,203
Net loans	382,242,913	385,646,132
Financial liabilities
Deposits	224,476,684	232,602,224
Federal Home Loan Bank advances	24,346,302	34,622,359
Carrying Value
Financial assets
Cash and due from banks	19,112,785	16,040,195
Interest bearing deposits with banks	14,868,718	684,100
Securities held-to-maturity	206,261,065
Securities available-for-sale	200,389,756	432,065,590
Net loans	381,992,340	384,104,766
Financial liabilities
Deposits	695,291,209	654,629,796
Federal Home Loan Bank advances	23,500,000	33,500,000
Securities Sold under Agreement to Repurchase	$ 82,318,447	$ 82,420,781