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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2015
Fair Value Measurements [Abstract] |
Fair Value Hierarchy | The following table represents the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis:
|  | Fair Value at December 31, 2015 |  | Fair Value at December 31, 2014 |
Assets |  | Level 1 |  | Level 2 |  | Level 3 |  | Level 1 |  | Level 2 |  | Level 3 |
Money market funds |  | $ | 14,950 |  | $ | — |  | $ | — |  | $ | 20,354 |  | $ | — |  | $ | — |
Government-backed security |  |  | — |  |  | 20,000 |  |  | — |  |  | — |  |  | 7,500 |  |  | — |
Asset-backed securities(1) |  |  | — |  |  | 28,924 |  |  | — |  |  | — |  |  | 46,624 |  |  | — |
Corporate debt securities(2) |  |  | — |  |  | 137,213 |  |  | — |  |  | — |  |  | 89,097 |  |  | — |
Total cash equivalents and marketable securities |  | $ | 14,950 |  | $ | 186,137 |  | $ | — |  | $ | 20,354 |  | $ | 143,221 |  | $ | — |
| (1) | Includes $8,185 classified as cash and cash equivalents (See Note 3).
| (2) | Includes $20,404 classified as cash and cash equivalents (See Note 3).

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, 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 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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