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CASH, CASH EQUIVALENTS, AND MARKETABLE SECURITIES - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 28, 2024 | Jun. 28, 2024 | Jun. 30, 2023 | Sep. 29, 2023
Investments, Debt and Equity Securities [Abstract] |  |  |  |
Proceeds from maturities of available-for-sale securities |  | $ 19,650 | $ 0 |
Investments purchased | $ 2,220 | 2,220 | 40,696 |
Proceeds from sale of available-for-sale securities |  | 0 | 0 |
Purchases of available-for-sale securities |  | 0 | 0 |
Unrealized gain (loss) on available-for-sale securities, net of tax |  | 0 | 0 |
Short term investments | 21,546 | 21,546 | 26,651 | $ 26,764
Investments | $ 2,237 | $ 2,237 | $ 14,045 | $ 13,943

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