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Fair Value Measurements (Tables) | 3 Months Ended
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Apr. 04, 2015
Fair Value Disclosures [Abstract] |
Assets and Liabilities that are Measured at Fair Value on a Recurring Basis | The following tables set forth by level within the fair value hierarchy, our financial assets that were accounted for at fair value on a recurring basis, according to the valuation techniques we used to determine their fair value (in thousands):
|  | April 4, 2015
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Marketable debt securities – current |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 17,510 |  |  | $ | — |  |  | $ | — |  |  | $ | 17,510 |
Corporate bonds |  | — |  |  | 20,118 |  |  | — |  |  | 20,118 |
Commercial paper |  | — |  |  | 14,987 |  |  | — |  |  | 14,987 |
U.S. Agency bonds |  | — |  |  | 12,521 |  |  | — |  |  | 12,521 |
Municipal bonds |  | — |  |  | 9,899 |  |  | — |  |  | 9,899 |
|  | 17,510 |  |  | 57,525 |  |  | — |  |  | 75,035 |
Marketable debt securities – non-current |  |  |  |  |  |  |  |
U.S. Treasury securities |  | 15,021 |  |  | — |  |  | — |  |  | 15,021 |
Corporate bonds |  | — |  |  | 12,683 |  |  | — |  |  | 12,683 |
U.S. Agency bonds |  | — |  |  | 10,034 |  |  | — |  |  | 10,034 |
Municipal bonds |  | — |  |  | 3,136 |  |  | — |  |  | 3,136 |
|  | 15,021 |  |  | 25,853 |  |  | — |  |  | 40,874 |
|  | $ | 32,531 |  |  | $ | 83,378 |  |  | $ | — |  |  | $ | 115,909 |
|  | January 3, 2015
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Marketable debt securities – current |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 17,506 |  |  | $ | — |  |  | $ | — |  |  | $ | 17,506 |
Corporate bonds |  | — |  |  | 20,139 |  |  | — |  |  | 20,139 |
U.S. Agency bonds |  | — |  |  | 12,525 |  |  | — |  |  | 12,525 |
Commercial paper |  | — |  |  | 12,486 |  |  | — |  |  | 12,486 |
Municipal bonds |  | — |  |  | 6,953 |  |  | — |  |  | 6,953 |
|  | 17,506 |  |  | 52,103 |  |  | — |  |  | 69,609 |
Marketable debt securities – non-current |  |  |  |  |  |  |  |
U.S. Treasury securities |  | 14,990 |  |  | — |  |  | — |  |  | 14,990 |
Corporate bonds |  | — |  |  | 15,236 |  |  | — |  |  | 15,236 |
U.S. Agency bonds |  | — |  |  | 10,014 |  |  | — |  |  | 10,014 |
Municipal bonds |  | — |  |  | 4,201 |  |  | — |  |  | 4,201 |
|  | 14,990 |  |  | 29,451 |  |  | — |  |  | 44,441 |
|  | $ | 32,496 |  |  | $ | 81,554 |  |  | $ | — |  |  | $ | 114,050 |

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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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