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Fair Value Measurements (Tables) | 3 Months Ended
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Dec. 28, 2024
Fair Value Disclosures [Abstract] |
Fair Value, Assets Measured on Recurring Basis | The following table summarizes cash, cash equivalents and marketable securities by investment category as of December 28, 2024 and September 28, 2024:
|  | December 28, 2024
|  | Amortized Cost |  | Unrealized Gain |  | Unrealized Loss |  | Estimated Fair Value |  | Cash and Cash Equivalents |  | Marketable Securities
Cash |  | $ | 234,980 |  |  | $ | — |  |  | $ | — |  |  | $ | 234,980 |  |  | $ | 234,980 |  |  | $ | — |
Level 1: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | 40,881 |  |  | — |  |  | — |  |  | 40,881 |  |  | 40,881 |  |  | — |
Subtotal |  | 40,881 |  |  | — |  |  | — |  |  | 40,881 |  |  | 40,881 |  |  | — |
Level 2: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | 51,959 |  |  | 50 |  |  | (13) |  |  | 51,996 |  |  | 4,094 |  |  | 47,902 |
Subtotal |  | 51,959 |  |  | 50 |  |  | (13) |  |  | 51,996 |  |  | 4,094 |  |  | 47,902 |
Total |  | $ | 327,820 |  |  | $ | 50 |  |  | $ | (13) |  |  | $ | 327,857 |  |  | $ | 279,955 |  |  | $ | 47,902 |
|  | September 28, 2024
|  | Amortized Cost |  | Unrealized Gain |  | Unrealized Loss |  | Estimated Fair Value |  | Cash and Cash Equivalents |  | Marketable Securities
Cash |  | $ | 144,184 |  |  | $ | — |  |  | $ | — |  |  | $ | 144,184 |  |  | $ | 144,184 |  |  | $ | — |
Level 1: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | 25,548 |  |  | — |  |  | — |  |  | 25,548 |  |  | 25,548 |  |  | — |
Subtotal |  | 25,548 |  |  | — |  |  | — |  |  | 25,548 |  |  | 25,548 |  |  | — |
Level 2: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | 51,304 |  |  | 122 |  |  | — |  |  | 51,426 |  |  | — |  |  | 51,426 |
Subtotal |  | 51,304 |  |  | 122 |  |  | — |  |  | 51,426 |  |  | — |  |  | 51,426 |
Total |  | $ | 221,036 |  |  | $ | 122 |  |  | $ | — |  |  | $ | 221,158 |  |  | $ | 169,732 |  |  | $ | 51,426 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class 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/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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