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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently Adopted Accounting Standards (Details) - USD ($) $ in Millions | Dec. 30, 2022 | Oct. 01, 2022 | Sep. 30, 2022 | Jun. 09, 2020
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Additional paid-in capital | $ (437.9) |  | $ (469.1) |
Long-term debt, net | 440.8 |  | 412.3 |
Deferred tax assets | 1.9 |  | 2.3 |
Retained earnings | $ 73.3 |  | $ 63.8 |
Accounting Standards Update 2020-06 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Additional paid-in capital |  | $ 34.6 |  |
Long-term debt, net |  | 28.0 |  |
Deferred tax assets |  | 0.1 |  |
Retained earnings |  | $ 6.5 |  |
Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Contractual interest rate | 4.00% |  |  |
Convertible Notes | Convertible Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Contractual interest rate | 4.00% |  |  | 4.00%

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