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Cash, Money Market Funds and Marketable Securities (Tables) | 3 Months Ended
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Mar. 31, 2017
Cash, Money Market Funds and Marketable Securities |
Schedule of cash and available-for-sale securities | Cash and available-for-sale securities are all current unless mentioned otherwise and consisted of the following as of March 31, 2017 and December 31, 2016 (in thousands):
|  | As of March 31, 2017 |
|  | Cost |  | Gross unrealized Gain |  | Gross unrealized Loss |  | Fair Value |
Cash balances |  | $ | 44,755 |  | $ | — |  | $ | — |  | $ | 44,755 |
Corporate debt securities, current portion |  | 124,061 |  | 5 |  | (38 | ) | 124,028 |
Commercial paper |  | 110,441 |  | 218 |  | — |  | 110,659 |
Money market |  | 350 |  | — |  | — |  | 350 |
Certificate of deposit |  | 50 |  | — |  | — |  | 50 |
|  | $ | 279,657 |  | $ | 223 |  | $ | (38 | ) | $ | 279,842 |
Included in cash and cash equivalents |  | $ | 44,755 |  | $ | — |  | $ | — |  | $ | 44,755 |
Included in marketable securities |  | 234,902 |  | 223 |  | (38 | ) | 235,087 |
Total cash and marketable securities |  | $ | 279,657 |  | 223 |  | $ | (38 | ) | $ | 279,842 |
|  | As of December 31, 2016 |
|  | Cost |  | Unrealized Gain |  | Unrealized Loss |  | Fair Value |
Cash balances |  | $ | 187,026 |  | $ | — |  | $ | — |  | $ | 187,026 |
Corporate debt securities, current portion |  | 74,564 |  | 2 |  | (31 | ) | 74,535 |
Commercial paper |  | 68,258 |  | 132 |  | — |  | 68,390 |
Money market |  | 350 |  | — |  | — |  | 350 |
Certificate of deposit |  | 50 |  | — |  | — |  | 50 |
|  | $ | 330,248 |  | $ | 134 |  | $ | (31 | ) | $ | 330,351 |
Included in cash and cash equivalents |  | $ | 187,026 |  | $ | — |  | $ | — |  | $ | 187,026 |
Included in marketable securities |  | 143,222 |  | 134 |  | (31 | ) | 143,325 |
Total cash and marketable securities |  | $ | 330,248 |  | 134 |  | $ | (31 | ) | $ | 330,351 |

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