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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 29, 2019
Fair Value Disclosures [Abstract] |
Fair Value, Assets and Liabilities Measured on Recurring Basis | The following table summarizes assets and liabilities measured at fair value on a recurring basis as of September 29, 2019 and December 31, 2018:
| As of September 29, 2019 |  | As of December 31, 2018
| Total |  | Quoted market prices in active markets (Level 1) |  | Significant other observable inputs (Level 2) |  | Total |  | Quoted market prices in active markets (Level 1) |  | Significant other observable inputs (Level 2)
| (In thousands)
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash equivalents: U.S. treasuries (<90 days) | $ | 11,176 |  |  | $ | 11,176 |  |  | $ | — |  |  | $ | 438 |  |  | $ | 438 |  |  | $ | — |
Available-for-sale securities: U.S. treasuries (1) | 39,941 |  |  | 39,941 |  |  | — |  |  | 49,737 |  |  | 49,737 |  |  | — |
Foreign currency forward contracts (2) | 343 |  |  | — |  |  | 343 |  |  | 322 |  |  | — |  |  | 322 |
Total assets measured at fair value | $ | 51,460 |  |  | $ | 51,117 |  |  | $ | 343 |  |  | $ | 50,497 |  |  | $ | 50,175 |  |  | $ | 322 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward contracts (3) | $ | 56 |  |  | $ | — |  |  | $ | 56 |  |  | $ | 71 |  |  | $ | — |  |  | $ | 71 |
Total liabilities measured at fair value | $ | 56 |  |  | $ | — |  |  | $ | 56 |  |  | $ | 71 |  |  | $ | — |  |  | $ | 71 |
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(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 Accrued liabilities on the Company’s unaudited condensed consolidated balance sheets.

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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=117815213&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=117815213&loc=d3e19207-110258 + Details
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