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Fair Value Measurement - Schedule of Assumptions Used For Valuing The Warrants (Detail)	1 Months Ended	12 Months Ended
	Apr. 30, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Expected dividend yield	0.00%	0.00%
Expected volatility	80.00%	79.50%
Risk-free interest rate	1.43%	1.67%
Marketability discount	10.00%	10.00%

X

- Definition

Fair value assumptions marketability discount.

+ References

No definition available.

+ Details

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X

- Definition

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

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- Definition

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

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- Definition

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

+ 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

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No definition available.

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