Conversion Option and Warrant Derivative Liabilities (Detail)	12 Months Ended
Dec. 31, 2014
Derivative [Line Items]
Volatility	35.00%
Dividend yield	0.00%
Minimum
Derivative [Line Items]
Risk-free interest rate	0.40%
Expected life, in years	3 months
Maximum
Derivative [Line Items]
Risk-free interest rate	0.14%
Expected life, in years	7 months 24 days
Issuances date
Derivative [Line Items]
Dividend yield	0.00%
Issuances date \| Minimum
Derivative [Line Items]
Volatility	40.00%
Risk-free interest rate	0.11%
Expected life, in years	1 year 1 month 6 days
Issuances date \| Maximum
Derivative [Line Items]
Volatility	45.00%
Risk-free interest rate	0.30%
Expected life, in years	1 year 7 months 6 days

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Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

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- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

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- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

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