Fair Value of Financial Instruments - Summary of Changes in Fair Value of Level 3 Financial Liabilities (Detail) $ in Thousands	9 Months Ended
Sep. 30, 2015 USD ($)
Fair Value Disclosures [Abstract]
Fair value, beginning of period	$ 138
Change in fair value of Level 3 financial liabilities	(45)
Reclassification of preferred stock warrant liabilities to additional paid-in-capital in conjunction with the conversion of the convertible preferred stock into common stock upon closing of the Merger	$ (93)

No definition available.

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- Definition

Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ 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 (c)

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

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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

+ Details

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- Definition

Fair value measurement with unobservable inputs reconciliation recurring basis liability convertible preferred stock into common stock.

+ References

No definition available.

+ Details

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