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Fair Value on Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2016
Fair Values of Financial Assets and Liabilities | The fair values of the Company’s financial assets and liabilities were determined using the following inputs at March 31, 2016 (in thousands):
|  | Balance sheet classification |  | Total |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Money market funds |  | Cash and cash equivalents |  | $ | 6,648 |  |  | $ | 6,648 |  |  | $ | — |  |  | $ | — |
United States government agency securities |  | Short-term investments |  |  | 9,997 |  |  |  | — |  |  |  | 9,997 |  |  |  | — |
Corporate debt securities |  | Short-term investments |  |  | 60,516 |  |  |  | — |  |  |  | 60,516 |  |  |  | — |
Marketable equity securities |  | Marketable equity securities |  |  | 5,082 |  |  |  | 5,082 |  |  |  | — |  |  |  | — |
Total financial assets |  |  |  | $ | 82,243 |  |  | $ | 11,730 |  |  | $ | 70,513 |  |  | $ | — |
The fair values of the Company’s financial assets and liabilities were determined using the following inputs at December 31, 2015 (in thousands):
|  | Balance sheet classification |  | Total |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Money market funds |  | Cash and cash equivalents |  | $ | 59,302 |  |  | $ | 59,302 |  |  | $ | — |  |  | $ | — |
Corporate debt securities |  | Short-term investments |  |  | 25,698 |  |  |  | — |  |  |  | 25,698 |  |  |  | — |
Marketable equity securities |  | Marketable equity securities |  |  | 11,163 |  |  |  | 11,163 |  |  |  | — |  |  |  | — |
Total financial assets |  |  |  | $ | 96,163 |  |  | $ | 70,465 |  |  | $ | 25,698 |  |  | $ | — |

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a,b,bb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI http://asc.fasb.org/extlink&oid=36462937&loc=SL7498348-110258 Reference 4: 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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