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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 + Details
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