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Investment Securities - Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses and Approximate Fair Values of Available-for-Sale Securities (Detail) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 40,735,300	$ 42,337,100
Gross Unrealized Gains		26,170
Gross Unrealized Losses	(1,192,225)	(643,950)
Fair Value	39,543,075	41,719,320
U. S. Government Agency Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,500,000	7,500,000
Gross Unrealized Gains		26,170
Gross Unrealized Losses	(311,397)
Fair Value	7,188,603	7,526,170
U. S. Government Agency Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	24,235,300	25,837,100
Gross Unrealized Losses	(490,921)	(130,209)
Fair Value	23,744,379	25,706,891
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,000,000	9,000,000
Gross Unrealized Losses	(389,907)	(513,741)
Fair Value	$ 8,610,093	$ 8,486,259

X

- Definition

Amount of accumulated pre-tax unrealized gain before deducting pre-tax unrealized losses on investments in available-for-sale securities impacting investments.

+ References

No definition available.

+ Details

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X

- Definition

Amount of accumulated pre-tax unrealized loss before deducting pre-tax unrealized gain on investments in available-for-sale securities impacting investments.

+ References

No definition available.

+ Details

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X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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