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Fair Value Measurement (Tables) | 12 Months Ended
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Dec. 31, 2017
Fair Value Disclosures [Abstract] |
Schedule of Fair Value, Assets and Liabilities | The Company’s financial assets and liabilities, subject to fair value measurements, as of December 31, 2017 and 2016 are as follows: Note E – Fair Value Measurement (continued)
|  |  |  | December 31, 2017
|  |  |  | Fair Value Measurements Using Fair Value Hierarchy
|  | Fair value |  | Level 1 |  | Level 2 |  | Level 3
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 58,436 |  |  | $ | 58,436 |  |  | $ | — |  |  | $ | — |
Current marketable securities – available for sale |  | 64,027 |  |  | 64,027 |  |  | — |  |  | — |
Long-term marketable securities – available for sale |  | 29,523 |  |  | 29,523 |  |  | — |  |  | — |
Total assets |  | $ | 151,986 |  |  | $ | 151,986 |  |  | $ | — |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration |  | $ | 10,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,000 |
Forward contracts |  | 783 |  |  | — |  |  | 783 |  |  | — |
Total liabilities |  | $ | 10,783 |  |  | $ | — |  |  | $ | 783 |  |  | $ | 10,000 |
|  |  |  | December 31, 2016
|  |  |  | Fair Value Measurements Using Fair Value Hierarchy
|  | Fair value |  | Level 1 |  | Level 2 |  | Level 3
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 3,309 |  |  | $ | 3,309 |  |  | $ | — |  |  | $ | — |
Current marketable securities – available for sale |  | 39,495 |  |  | 39,495 |  |  | — |  |  | — |
Long-term marketable securities – available for sale |  | 70,559 |  |  | 70,559 |  |  | — |  |  | — |
Forward contracts |  | 191 |  |  | — |  |  | 191 |  |  | — |
Total assets |  | $ | 113,554 |  |  | $ | 113,363 |  |  | $ | 191 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration |  | $ | 7,948 |  |  | $ | — |  |  | $ | — |  |  | $ | 7,948 |
Total liabilities |  | $ | 7,948 |  |  | $ | — |  |  | $ | — |  |  | $ | 7,948 |

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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=66048111&loc=d3e19190-110258 + Details
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