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Investments | 6 Months Ended
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Mar. 29, 2024
Investments, Debt and Equity Securities [Abstract] |
INVESTMENTS | INVESTMENTS All investments are short-term in nature and are invested in certificates of deposit, corporate bonds, commercial paper, and U.S. Treasuries and agency bonds and are classified as available-for-sale. These certificates of deposit, corporate bonds, commercial paper and U.S. Treasuries and agency bonds are owned directly by the Company and are segregated in brokerage custody accounts. The amortized cost, gross unrealized holding gains or losses and fair value of our available-for-sale investments by major investment type are summarized in the tables below (in thousands):
| March 29, 2024
| Amortized Cost |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Aggregate Fair Value
Certificates of deposit | $ | 10,980 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 10,981 |
Corporate bonds | 243,039 |  |  | 36 |  |  | (1,615) |  |  | 241,460 |
Commercial paper | 48,589 |  |  | — |  |  | (60) |  |  | 48,529 |
U.S. Treasuries and agency bonds | 60,460 |  |  | 75 |  |  | (82) |  |  | 60,453 |
Total short-term investments | $ | 363,068 |  |  | $ | 112 |  |  | $ | (1,757) |  |  | $ | 361,423 |
| September 29, 2023
| Amortized Cost |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Aggregate Fair Value
Corporate bonds | $ | 145,234 |  |  | $ | — |  |  | $ | (2,845) |  |  | $ | 142,389 |
Commercial paper | 176,405 |  |  | — |  |  | (129) |  |  | 176,276 |
U.S. Treasuries and agency bonds | 21,895 |  |  | 18 |  |  | (4) |  |  | 21,909 |
Total short-term investments | $ | 343,534 |  |  | $ | 18 |  |  | $ | (2,978) |  |  | $ | 340,574 |
The contractual maturities of available-for-sale investments were as follows (in thousands):
| March 29, 2024 | September 29, 2023
Less than one year | $ | 219,861 |  | $ | 265,591 |
Over one year | 141,562 |  | 74,983 |
Total available-for-sale investments | $ | 361,423 |  | $ | 340,574 |
We have determined that the gross unrealized losses on available for sale securities as of March 29, 2024 and September 29, 2023 are temporary in nature and/or do not relate to credit loss, and therefore there is no expense for credit losses recorded in our condensed consolidated statements of operations. Unrealized gains and losses on available-for-sale investments are reported as a separate component of stockholders’ equity within accumulated other comprehensive loss.

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