Investment Securities - Aggregate Amortized Costs and Fair Values of Available-for-Sale Securities Portfolio (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 39,721,888	$ 36,277,498
Gross Unrealized Gains	128,946	494,208
Gross Unrealized (Losses)	(1,328,838)	(71,186)
Fair Value	38,521,996	36,700,520
US Government Agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,383,854	9,411,627
Gross Unrealized Gains	10,627	78,178
Gross Unrealized (Losses)	(86,412)	(25,990)
Fair Value	9,308,069	9,463,815
State and Municipal Obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	27,690,034	23,480,871
Gross Unrealized Gains	109,280	412,759
Gross Unrealized (Losses)	(1,242,426)	(44,102)
Fair Value	26,556,888	23,849,528
Certificates of Deposit
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,736,000	1,985,000
Gross Unrealized Gains	9,039	3,271
Gross Unrealized (Losses)		(1,094)
Fair Value	1,745,039	1,987,177
Auction Rate Security
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	912,000	1,400,000
Gross Unrealized Gains
Gross Unrealized (Losses)
Fair Value	$ 912,000	$ 1,400,000