Loans - Recorded Investment in Past Due and Nonaccruing Loans (Detail) (USD $)	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-89 Days Past Due	$ 1,517,199	$ 1,124,007
90 Days or More Past Due and Still Accruing	45,074	125,519
Nonaccruals	2,446,285	5,730,464
Total Past Due and Nonaccruals	4,008,558	6,979,990
Current	230,842,135	232,258,159
Total Gross Loans	234,850,693	239,238,149	241,490,579
Construction, Land and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-89 Days Past Due	176,569	230,866
Nonaccruals	848,496	655,397
Total Past Due and Nonaccruals	1,025,065	886,263
Current	26,460,682	28,138,031
Total Gross Loans	27,485,747	29,024,294	28,582,337
Farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,348,947	1,442,757
Total Gross Loans	1,348,947	1,442,757	1,484,981
Commercial Mortgages (Non-Owner Occupied) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruals		318,418
Total Past Due and Nonaccruals		318,418
Current	13,536,438	13,102,133
Total Gross Loans	13,536,438	13,420,551	20,884,287
Commercial Mortgages (Owner Occupied) [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
90 Days or More Past Due and Still Accruing		71,254
Nonaccruals	167,980	819,467
Total Past Due and Nonaccruals	167,980	890,721
Current	34,000,806	32,743,663
Total Gross Loans	34,168,786	33,634,384	26,063,505
Residential First Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-89 Days Past Due	1,233,737	761,981
90 Days or More Past Due and Still Accruing	302	502
Nonaccruals	482,254	2,677,788
Total Past Due and Nonaccruals	1,716,293	3,440,271
Current	105,730,741	104,115,423
Total Gross Loans	107,447,034	107,555,694	110,120,103
Residential Revolving and Junior Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-89 Days Past Due	40,869	18,081
90 Days or More Past Due and Still Accruing	19,830
Nonaccruals	943,967	1,257,915
Total Past Due and Nonaccruals	1,004,666	1,275,996
Current	26,224,596	25,706,516
Total Gross Loans	27,229,262	26,982,512	28,800,598
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-89 Days Past Due	9,560	100,886
90 Days or More Past Due and Still Accruing		50,075
Total Past Due and Nonaccruals	9,560	150,961
Current	17,063,167	20,373,586
Total Gross Loans	17,072,727	20,524,547	18,316,782
Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-89 Days Past Due	56,464	12,193
90 Days or More Past Due and Still Accruing	24,942	3,688
Nonaccruals	3,588	1,479
Total Past Due and Nonaccruals	84,994	17,360
Current	6,476,758	6,636,050
Total Gross Loans	$ 6,561,752	$ 6,653,410	$ 7,237,986