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CONVERTIBLE DEBT - Interest Expense (Details) - 2024 Notes - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jul. 01, 2022 | Jun. 30, 2023 | Jul. 01, 2022
Debt Instrument [Line Items] |  |  |  |
Contractual interest expense | $ 578 | $ 578 | $ 1,156 | $ 1,156
Amortization of debt issuance costs | 224 | 217 | 447 | 434
Total interest expense recognized | $ 802 | $ 795 | $ 1,603 | $ 1,590

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