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SEGMENT INFORMATION (Capital expenditures, depreciation and amortization expense by segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 30, 2023
Dec. 31, 2022
Segment Reporting, Other Significant Reconciling Item [Line Items]    
Capital expenditures: $ 3,533 $ 15,651
Depreciation and amortization expense:    
Depreciation expense: 6,638 4,219
Amortization expense: 1,347 1,394
Ball Bonding Equipment    
Segment Reporting, Other Significant Reconciling Item [Line Items]    
Capital expenditures: 396 184
Depreciation and amortization expense:    
Depreciation expense: 321 376
Amortization expense: 0 0
Wedge Bonding Equipment    
Segment Reporting, Other Significant Reconciling Item [Line Items]    
Capital expenditures: 14 185
Depreciation and amortization expense:    
Depreciation expense: 284 275
Amortization expense: 0 0
Advanced Solutions    
Segment Reporting, Other Significant Reconciling Item [Line Items]    
Capital expenditures: 244 11,707
Depreciation and amortization expense:    
Depreciation expense: 3,047 618
Amortization expense: 0 0
APS    
Segment Reporting, Other Significant Reconciling Item [Line Items]    
Capital expenditures: 425 1,325
Depreciation and amortization expense:    
Depreciation expense: 1,323 1,609
Amortization expense: 226 359
All Others    
Segment Reporting, Other Significant Reconciling Item [Line Items]    
Capital expenditures: 141 166
Depreciation and amortization expense:    
Depreciation expense: 380 269
Amortization expense: 1,029 943
Corporate Expenses    
Segment Reporting, Other Significant Reconciling Item [Line Items]    
Capital expenditures: 2,313 2,084
Depreciation and amortization expense:    
Depreciation expense: 1,283 1,072
Amortization expense: $ 92 $ 92