Impaired Loans (Detail) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Recorded Balance, Total	$ 2,365,728	$ 2,365,728	$ 2,869,063
Unpaid Principal Balance, Total	2,365,728	2,365,728	2,869,063
Specific Allowance, Total	713,675	713,675	690,329
Average Impairment in Impaired Loans, Total	2,453,128	2,490,593	3,038,339
Interest Income Recognized, Total	36,305	119,924	163,390
Interest Income Recognized, Cash Basis, Total	30,449	122,453	185,279
Mortgage loans on real estate | One-to-four family residential
Financing Receivable, Impaired [Line Items]
Loans without a specific valuation allowance, Recorded Balance	285,550	285,550	235,856
Loans without a specific valuation allowance, Unpaid Principal Balance	285,550	285,550	235,856
Loans without a specific valuation allowance, Specific Allowance
Loans without a specific valuation allowance, Average Impairment in Impaired Loans	286,127	286,967	249,103
Loans without a specific valuation allowance, Interest Income Recognized	3,348	10,042	10,446
Loans without a specific valuation allowance, Interest Income Recognized Cash Basis	2,889	9,603	11,162
Loans with a specific valuation allowance, Recorded Balance			316,065
Loans with a specific valuation allowance, Unpaid Principal Balance			316,065
Loans with a specific valuation allowance, Specific Allowance			36,300
Loans with a specific valuation allowance, Average Impairment in Impaired Loans			368,040
Loans with a specific valuation allowance, Interest Income Recognized			25,241
Loans with a specific valuation allowance, Interest Income Recognized Cash Basis			18,341
Recorded Balance, Total	285,550	285,550	551,921
Unpaid Principal Balance, Total	285,550	285,550	551,921
Specific Allowance, Total			36,300
Average Impairment in Impaired Loans, Total	286,127	286,967	617,143
Interest Income Recognized, Total	3,348	10,042	35,687
Interest Income Recognized, Cash Basis, Total	2,889	9,603	29,503
Mortgage loans on real estate | Commercial
Financing Receivable, Impaired [Line Items]
Loans without a specific valuation allowance, Recorded Balance	201,135	201,135	69,249
Loans without a specific valuation allowance, Unpaid Principal Balance	201,135	201,135	69,249
Loans without a specific valuation allowance, Specific Allowance
Loans without a specific valuation allowance, Average Impairment in Impaired Loans	205,756	205,756	71,972
Loans without a specific valuation allowance, Interest Income Recognized	5,459	20,757	457
Loans without a specific valuation allowance, Interest Income Recognized Cash Basis	674	16,136	254
Loans with a specific valuation allowance, Recorded Balance	1,087,231	1,087,231	1,658,157
Loans with a specific valuation allowance, Unpaid Principal Balance	1,087,231	1,087,231	1,658,157
Loans with a specific valuation allowance, Specific Allowance	139,523	139,523	357,880
Loans with a specific valuation allowance, Average Impairment in Impaired Loans	1,139,246	1,144,247	1,726,905
Loans with a specific valuation allowance, Interest Income Recognized	17,358	51,951	88,084
Loans with a specific valuation allowance, Interest Income Recognized Cash Basis	17,400	52,075	117,289
Recorded Balance, Total	1,288,366	1,288,366	1,727,406
Unpaid Principal Balance, Total	1,288,366	1,288,366	1,727,406
Specific Allowance, Total	139,523	139,523	357,880
Average Impairment in Impaired Loans, Total	1,345,002	1,350,003	1,798,877
Interest Income Recognized, Total	22,817	72,708	88,541
Interest Income Recognized, Cash Basis, Total	18,074	68,211	117,543
Mortgage loans on real estate | Home equity
Financing Receivable, Impaired [Line Items]
Loans without a specific valuation allowance, Recorded Balance	43,698	43,698	29,353
Loans without a specific valuation allowance, Unpaid Principal Balance	43,698	43,698	29,353
Loans without a specific valuation allowance, Specific Allowance
Loans without a specific valuation allowance, Average Impairment in Impaired Loans	39,090	60,211	21,954
Loans without a specific valuation allowance, Interest Income Recognized	834	3,121	1,933
Loans without a specific valuation allowance, Interest Income Recognized Cash Basis	819	3,187	1,605
Recorded Balance, Total	43,698	43,698	29,353
Unpaid Principal Balance, Total	43,698	43,698	29,353
Average Impairment in Impaired Loans, Total	39,090	60,211	21,954
Interest Income Recognized, Total	834	3,121	1,933
Interest Income Recognized, Cash Basis, Total	819	3,187	1,605
Commercial business
Financing Receivable, Impaired [Line Items]
Loans with a specific valuation allowance, Recorded Balance	741,498	741,498	552,814
Loans with a specific valuation allowance, Unpaid Principal Balance	741,498	741,498	552,814
Loans with a specific valuation allowance, Specific Allowance	567,536	567,536	296,149
Loans with a specific valuation allowance, Average Impairment in Impaired Loans	775,955	786,075	592,796
Loans with a specific valuation allowance, Interest Income Recognized	9,171	33,605	37,192
Loans with a specific valuation allowance, Interest Income Recognized Cash Basis	8,510	40,995	36,628
Recorded Balance, Total	741,498	741,498	552,814
Unpaid Principal Balance, Total	741,498	741,498	552,814
Specific Allowance, Total	567,536	567,536	296,149
Average Impairment in Impaired Loans, Total	775,955	786,075	592,796
Interest Income Recognized, Total	9,171	33,605	37,192
Interest Income Recognized, Cash Basis, Total	8,510	40,995	36,628
Consumer loan
Financing Receivable, Impaired [Line Items]
Loans with a specific valuation allowance, Recorded Balance	6,616	6,616	7,569
Loans with a specific valuation allowance, Unpaid Principal Balance	6,616	6,616	7,569
Loans with a specific valuation allowance, Specific Allowance	6,616	6,616
Loans with a specific valuation allowance, Average Impairment in Impaired Loans	6,954	7,337	7,569
Loans with a specific valuation allowance, Interest Income Recognized	135	448	37
Loans with a specific valuation allowance, Interest Income Recognized Cash Basis	157	457
Recorded Balance, Total	6,616	6,616	7,569
Unpaid Principal Balance, Total	6,616	6,616	7,569
Specific Allowance, Total	6,616	6,616
Average Impairment in Impaired Loans, Total	6,954	7,337	7,569
Interest Income Recognized, Total	135	448	37
Interest Income Recognized, Cash Basis, Total	$ 157	$ 457