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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Total equity-based compensation expense) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Dec. 30, 2023 | Dec. 31, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Total equity-based compensation expense | $ 7,857 | $ 6,521
Time-based RSUs |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Total equity-based compensation expense | 4,543 | 3,587
Relative TSR PSUs |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Total equity-based compensation expense | 1,560 | 1,252
Growth PSUs |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Total equity-based compensation expense | 1,439 | 1,445
Common Stock |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Total equity-based compensation expense | 315 | 237
Cost of sales |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Total equity-based compensation expense | 359 | 308
Selling, general and administrative |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Total equity-based compensation expense | 5,680 | 4,867
Research and development |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Total equity-based compensation expense | $ 1,818 | $ 1,346

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