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Fair Value Measurements (Tables) | 9 Months Ended
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Oct. 03, 2021
Fair Value Disclosures [Abstract] |
Fair Value, Assets and Liabilities Measured on Recurring Basis | The following tables summarize assets and liabilities measured at fair value on a recurring basis as of October 3, 2021 and December 31, 2020:
|  | As of October 3, 2021 |
|  | Total |  |  | Quoted market prices in active markets (Level 1) |  |  | Significant other observable inputs (Level 2) |  |  | Significant unobservable inputs (Level 3) |
|  | (In thousands) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents: money-market funds |  | $ | 140,130 |  |  | $ | 140,130 |  |  | $ | — |  |  | $ | — |
Available-for-sale investments: convertible debt securities(1) |  |  | 1,498 |  |  |  | — |  |  |  | 172 |  |  |  | 1,326 |
Available-for-sale investments: corporate equity securities(1) |  |  | 668 |  |  |  | 668 |  |  |  | — |  |  |  | — |
Available-for-sale investments: certificates of deposit(1) |  |  | 145 |  |  |  | — |  |  |  | 145 |  |  |  | — |
Trading securities: mutual funds(1) |  |  | 6,617 |  |  |  | 6,617 |  |  |  | — |  |  |  | — |
Foreign currency forward contracts(2) |  |  | 1,016 |  |  | — |  |  |  | 1,016 |  |  |  | — |
Long-term investments: convertible debt securities(3) |  |  | 346 |  |  |  | — |  |  |  | 346 |  |  |  | — |
Total assets measured at fair value |  | $ | 150,420 |  |  | $ | 147,415 |  |  | $ | 1,679 |  |  | $ | 1,326 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward contracts(4) |  | $ | 117 |  |  | $ | — |  |  | $ | 117 |  |  | $ | — |
Total liabilities measured at fair value |  | $ | 117 |  |  | $ | — |  |  | $ | 117 |  |  | $ | — |
|  | As of December 31, 2020 |
|  | Total |  |  | Quoted market prices in active markets (Level 1) |  |  | Significant other observable inputs (Level 2) |  |  | Significant unobservable inputs (Level 3) |
|  | (In thousands) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents: money-market funds |  | $ | 158,054 |  |  | $ | 158,054 |  |  | $ | — |  |  | $ | — |
Available-for-sale investments: convertible debt securities(1) |  |  | 1,326 |  |  |  | — |  |  |  | — |  |  |  | 1,326 |
Available-for-sale investments: certificates of deposit(1) |  |  | 165 |  |  |  | — |  |  |  | 165 |  |  |  | — |
Trading securities: mutual funds(1) |  |  | 5,368 |  |  |  | 5,368 |  |  |  | — |  |  |  | — |
Foreign currency forward contracts(2) |  |  | 324 |  |  | — |  |  |  | 324 |  |  |  | — |
Total assets measured at fair value |  | $ | 165,237 |  |  | $ | 163,422 |  |  | $ | 489 |  |  | $ | 1,326 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward contracts(4) |  | $ | 2,382 |  |  | $ | — |  |  | $ | 2,382 |  |  | $ | — |
Contingent consideration(5) |  |  | 3,000 |  |  |  | — |  |  |  | — |  |  |  | 3,000 |
Total liabilities measured at fair value |  | $ | 5,382 |  |  | $ | — |  |  | $ | 2,382 |  |  | $ | 3,000 |
(1) | Included in Short-term investments on the Company's unaudited condensed consolidated balance sheets.
(2) | Included in Prepaid expenses and other current assets on the Company's unaudited condensed consolidated balance sheets.
(3) | Included in Other non-current assets on the Company's unaudited condensed consolidated balance sheets.
(4) | Included in Other accrued liabilities on the Company's unaudited condensed consolidated balance sheets.
(5) | Included in Other non-current accrued liabilities on the Company's unaudited condensed consolidated balance sheets. The contingent consideration represents the estimated fair value of the additional variable cash consideration payable in connection with the acquisition of Meural in August 2018 that is contingent upon the achievement of certain technical and service revenue milestones.

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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