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Financial Instruments - Effect of Derivative Instruments on Condensed Consolidated Statement of Operations (Parenthetical) (Detail) (USD $)	6 Months Ended
	Jun. 30, 2012
Fair Value Disclosures [Abstract]
Net proceeds from derivative instruments	$ 1,030,000

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- Definition

The cash inflow provided by derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 23

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3505-108585

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