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EMPLOYEE STOCK PLANS - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2017 | Oct. 03, 2025 | Sep. 27, 2024 | Sep. 29, 2023 | Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Compensation cost not yet recognized |  | $ 20.3 |  |  |
Compensation cost period for recognition (in years) |  | 2 years 1 month 6 days |  |  |
Expected dividend |  | 0.00% |  |  |
Options, grants in period, grant date fair value |  | $ 0.0 | $ 0.1 | $ 4.0 |
Options exercised, intrinsic value |  | 0.0 | 0.0 | 0.1 |
Grant-date fair value of shares granted in the period |  | 11.6 | 17.2 | 11.3 |
Shares outstanding, market value |  | $ 23.2 | $ 20.0 | $ 24.0 |
Employee Stock Purchase Plans |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Expected dividend |  | 0.00% | 0.00% | 0.00% |
Employee Stock Option Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Expected dividend |  | 0.00% | 0.00% | 0.00% |
Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award expiration period (in years) |  | 7 years |  |  |
Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting period (in months) |  | 48 months |  |  |
Award expiration period (in years) |  | 10 years |  |  |
2017 ESPP |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares authorized (in shares) |  | 800,000 |  |  |
2017 ESPP | Employee Stock Purchase Plans |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Purchase price of common stock, percent | 85.00% | 85.00% |  |  |
Purchase period | 6 months |  |  |  |
Number of additional shares authorized (in shares) |  |  |  |  | 900,000
Number of shares authorized (in shares) |  | 2,700,000 |  |  |
Stock plan offering period (in months) |  | 6 months |  |  |
2020 Omnibus Stock Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares authorized (in shares) |  | 4,500,000 |  |  |

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