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Marketable Securities and Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2016
Fair Value Disclosures [Abstract] |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | As of June 30, 2016, the estimated fair value of our marketable securities, classified as available for sale, are as follows (in thousands):
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Certificates of deposit |  | $ | 9,000 |  |  | $ | 2 |  |  | $ | (1 | ) |  | $ | 9,001 |
Corporate securities |  | 35,870 |  |  | 103 |  |  | (7 | ) |  | 35,966 |
Commercial paper |  | 23,392 |  |  | 9 |  |  | — |  |  | 23,401 |
Asset-backed securities |  | 16,671 |  |  | 30 |  |  | — |  |  | 16,701 |
|  | $ | 84,933 |  |  | $ | 144 |  |  | $ | (8 | ) |  | $ | 85,069 |
Investments Classified by Contractual Maturity Date | The following table summarizes the contractual maturities of our marketable securities as of June 30, 2016 (in thousands):
| Amortized Cost |  | Fair Value
Due in one year or less | $ | 46,847 |  |  | $ | 46,875 |
Due between one year to three years | 38,086 |  |  | 38,194 |
Total available for sale marketable securities | $ | 84,933 |  |  | $ | 85,069 |
Schedule of Unrealized Loss on Investments | Marketable securities in an unrealized loss position as of June 30, 2016 consisted of the following (in thousands):
| Fair Value |  | Unrealized Losses
Certificates of deposit | $ | 3,499 |  |  | $ | (1 | )
Corporate securities | 4,179 |  |  | (7 | )
| $ | 7,678 |  |  | $ | (8 | )
Schedule of Fair Value of Assets Measured on Recurring Basis | The following table sets forth the fair value of our cash, cash equivalents and marketable securities on a recurring basis, by level, within the fair value hierarchy (in thousands):
|  | June 30, 2016 |  | December 31, 2015
|  | Cash and Cash Equivalents |  | Marketable Securities |  | Total |  | Cash and Cash Equivalents |  | Marketable Securities |  | Total
Cash |  | $ | 27,302 |  |  |  |  | $ | 27,302 |  |  | $ | 27,036 |  |  |  |  | $ | 27,036 |
Level I |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 1,330 |  |  | $ | — |  |  | $ | 1,330 |  |  | $ | 71,081 |  |  | $ | — |  |  | $ | 71,081 |
|  | 1,330 |  |  | — |  |  | 1,330 |  |  | 71,081 |  |  | — |  |  | 71,081 |
Level II |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  | — |  |  | 9,001 |  |  | 9,001 |  |  | — |  |  | — |  |  | — |
Corporate securities |  | — |  |  | 35,966 |  |  | 35,966 |  |  | — |  |  | — |  |  | — |
Commercial paper |  | — |  |  | 23,401 |  |  | 23,401 |  |  | — |  |  | — |  |  | — |
Asset-backed securities |  | — |  |  | 16,701 |  |  | 16,701 |  |  | — |  |  | — |  |  | — |
|  | — |  |  | 85,069 |  |  | 85,069 |  |  | — |  |  | — |  |  | — |
Total |  | $ | 28,632 |  |  | $ | 85,069 |  |  | $ | 113,701 |  |  | $ | 98,117 |  |  | $ | — |  |  | $ | 98,117 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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