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Stockholders' Equity - Common Stock Reserved for Future Issuance (Detail) | Mar. 31, 2017 shares
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Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Common stock reserved for future issuance | 17,420,514
2016 Employee Stock Purchase Plan [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Common stock reserved for future issuance | 1,500,000
Warrants [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Common stock reserved for future issuance | 221,370
Stock options [Member] | Equity Incentive Plan 2008 [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Common stock reserved for future issuance | 622,192
Stock options [Member] | Equity Incentive Plan 2012 [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Common stock reserved for future issuance | 13,951,395
Stock options [Member] | 2016 Employee Stock Purchase Plan [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Common stock reserved for future issuance | 1,447,443,000
Restricted stock units (RSUs) [Member] | Equity Incentive Plan 2012 [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Common stock reserved for future issuance | 1,178,114,000

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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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