Summary of Stock Purchase Warrants (Detail)	6 Months Ended
Jun. 30, 2012
Number of Warrants
Balance, December 31, 2011	1,577,650
Issued
Exercised	(1,533,650)
Expired	(24,000)
Balance, June 30, 2012	0
Weighted Average Exercise Price
Balance, December 31, 2011	0.80
Issued
Exercised	0.80
Expired	0.80
Remaining Contractual Life (in years)
Balance, December 31, 2011	4 months 24 days

Class of Warrant or Right, Exercised in Period

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- Definition

Class of Warrant or Right Exercises In Period, Weighted Average Exercise Price of Warrants or Rights

+ References

No definition available.

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- Definition

Class of Warrant or Right, Expired in Period

+ References

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- Definition

Class of Warrant or Right Expired In Period, Weighted Average Exercise Price of Warrants or Rights

+ References

No definition available.

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- Definition

Class of Warrant or Right, Issued in Period

+ References

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- Definition

Class of Warrant or Right Issued In Period, Weighted Average Exercise Price of Warrants or Rights

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- Definition

Class Of Warrant Or Rights Weighted Average Remaining Contractual Term

+ References

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- Definition

Class of Warrant or Right, Weighted Average Exercise Price of Warrants or Rights

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No definition available.

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- Definition

Aggregate amount of each class of warrants or rights outstanding.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Article 4

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