v3.26.1
SEGMENT INFORMATION (Operating information by segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Apr. 04, 2026
Mar. 29, 2025
Apr. 04, 2026
Mar. 29, 2025
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net revenue $ 242,621 $ 161,986 $ 442,246 $ 328,110
Cost of sales 122,917 121,602 223,587 200,642
Selling, general and administrative 42,742 87,831 83,501 50,458
Research and development 38,396 37,220 78,772 75,028
Operating expenses 81,138 125,051 162,273 125,486
Income / (Loss) from operations 38,566 (84,667) 56,386 1,982
Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net revenue 62,433 32,862 104,064 143,251
Income / (Loss) from operations 38,566 (84,667) 56,386 1,982
Ball Bonding Equipment        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net revenue 160,206 66,281 270,489 125,967
Cost of sales 82,835 32,630 137,745 63,628
Selling, general and administrative 8,046 4,994 14,687 10,607
Research and development 10,155 9,362 20,411 19,009
Operating expenses 18,201 14,356 35,098 29,616
Income / (Loss) from operations 59,170 19,295 97,646 32,723
Wedge Bonding Equipment        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net revenue 13,070 36,197 34,191 68,420
Cost of sales 7,329 20,045 20,175 37,951
Selling, general and administrative 2,198 1,903 4,594 4,025
Research and development 6,145 5,336 12,396 10,828
Operating expenses 8,343 7,239 16,990 14,853
Income / (Loss) from operations (2,602) 8,913 (2,974) 15,616
Advanced Solutions        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net revenue 24,483 17,638 41,704 45,816
Cost of sales 10,346 7,365 19,972 13,669
Selling, general and administrative 4,427 4,267 8,962 (65,042)
Research and development 15,343 12,135 29,372 24,744
Operating expenses 19,770 16,402 38,334 (40,298)
Income / (Loss) from operations (5,633) (6,129) (16,602) 72,445
Recovery of direct costs       71,100
Gain (loss) from litigation settlement       1,700
Other selling, general and administrative expense       7,800
APS        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net revenue 34,694 31,615 74,318 63,732
Cost of sales 17,111 15,402 36,089 30,352
Selling, general and administrative 3,161 2,821 6,459 5,820
Research and development 2,924 2,609 5,776 5,093
Operating expenses 6,085 5,430 12,235 10,913
Income / (Loss) from operations 11,498 10,783 25,994 22,467
All Others        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net revenue 10,168 10,255 21,544 24,175
Cost of sales 5,273 46,158 9,577 55,031
Selling, general and administrative 3,697 45,636 7,470 48,537
Research and development 2,413 5,787 5,429 11,574
Operating expenses 6,110 51,423 12,899 60,111
Income / (Loss) from operations (1,215) (87,326) (932) (90,967)
Unallocated Corporate Expenses        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Net revenue 0 0 0 0
Cost of sales 23 2 29 11
Selling, general and administrative 21,213 28,210 41,329 46,511
Research and development 1,416 1,991 5,388 3,780
Operating expenses 22,629 30,201 46,717 50,291
Income / (Loss) from operations $ (22,652) $ (30,203) $ (46,746) $ (50,302)