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Anti-Dilutive Securities Not Included in the Computation of Net Loss per Share (Detail) - shares shares in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Preferred Stock |  |  |
Earnings Loss Per Share [Line Items] |  |  |
Anti-dilutive securities | 32,818 |  |
Convertible Debt |  |  |
Earnings Loss Per Share [Line Items] |  |  |
Anti-dilutive securities | 59,407 | 49,215 | 17,021
Stock options |  |  |
Earnings Loss Per Share [Line Items] |  |  |
Anti-dilutive securities | 17,818 | 10,670 | 9,330
Restricted Stock Units (RSUs) |  |  |
Earnings Loss Per Share [Line Items] |  |  |
Anti-dilutive securities | 10,887 | 2,256 | 196
Warrant |  |  |
Earnings Loss Per Share [Line Items] |  |  |
Anti-dilutive securities |  |  | 1,702

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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