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Capital Stock - Schedule of Common Stock Reserved for Future Issuance (Detail) - shares	Dec. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Common stock reserved for future issuance	15,211,975	1,394,360
Warrants Exercisable into Common Stock [Member]
Class of Stock [Line Items]
Common stock reserved for future issuance	13,633,070	166,403
Restricted Stock [Member]
Class of Stock [Line Items]
Common stock reserved for future issuance	1,889	5,190
Stock Options [Member]
Class of Stock [Line Items]
Common stock reserved for future issuance	1,577,016	1,222,767

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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