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Balance Sheet Components (Tables) | 6 Months Ended
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Jun. 30, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Schedule of Cash and Cash Equivalents | Cash and cash equivalents consisted of the following (in thousands):
|  | June 30, 2016 |  |  | December 31, 2015 |
Cash |  | $ | 77,094 |  |  | $ | 75,685 |
Money market funds |  |  | 113,317 |  |  |  | 77,639 |
Total cash and cash equivalents |  | $ | 190,411 |  |  | $ | 153,324 |
Summary of Amortized Cost, Gross Unrealized Holding Gains or Losses, and Fair Value of Available-for-Sale Investments | All investments are classified as available-for-sale. The amortized cost, gross unrealized holding gains or losses, and fair value of the Company’s available-for-sale investments by major investments type are summarized in the tables below (in thousands):
|  | June 30, 2016 |
|  | Amortized Cost |  |  | Gross Unrealized Holding Gains |  |  | Gross Unrealized Holding Losses |  |  | Fair Value |
Corporate bonds |  | $ | 125,130 |  |  | $ | 856 |  |  | $ | (5 | ) |  | $ | 125,981 |
Bond and mutual funds |  |  | 25,371 |  |  |  | 56 |  |  |  | — |  |  |  | 25,427 |
Equity investments |  |  | 125 |  |  |  | 112 |  |  |  | — |  |  |  | 237 |
Total investments |  | $ | 150,626 |  |  | $ | 1,024 |  |  | $ | (5 | ) |  | $ | 151,645 |
|  | December 31, 2015 |
|  | Amortized Cost |  |  | Gross Unrealized Holding Gains |  |  | Gross Unrealized Holding Losses |  |  | Fair Value |
Corporate bonds |  | $ | 126,522 |  |  | $ | 54 |  |  | $ | (473 | ) |  | $ | 126,103 |
Certificate of deposits |  |  | 8,217 |  |  |  | — |  |  |  | (2 | ) |  |  | 8,215 |
Bond and mutual funds |  |  | 25,052 |  |  |  | — |  |  |  | — |  |  |  | 25,052 |
Equity investments |  |  | 126 |  |  |  | 71 |  |  |  | — |  |  |  | 197 |
Total investments |  | $ | 159,917 |  |  | $ | 125 |  |  | $ | (475 | ) |  | $ | 159,567 |
Schedule of Accrued Liabilities | Accrued liabilities consisted of the following (in thousands):
|  | June 30, 2016 |  |  | December 31, 2015 |
Preclinical and clinical trial accruals |  | $ | 32,054 |  |  | $ | 27,973 |
Payroll and related accruals |  |  | 10,285 |  |  |  | 13,535 |
Professional services |  |  | 1,041 |  |  |  | 1,662 |
Other |  |  | 4,562 |  |  |  | 4,762 |
Total accrued liabilities |  | $ | 47,942 |  |  | $ | 47,932 |

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