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Fair Value Measurements - Additional Information (Detail)	Dec. 31, 2016 USD ($)
Fair Value Disclosures [Abstract]
Common stock warrants liability	$ 4,641

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- Definition

Common stock warrants fair value disclosure

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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