SEGMENT INFORMATION (Capital expenditures, depreciation and amortization expense by segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 04, 2026	Jun. 28, 2025	Jul. 04, 2026	Jun. 28, 2025
Segment Reporting [Line Items]
Capital expenditures:	$ 11,904	$ 2,733	$ 17,652	$ 7,560
Depreciation and amortization expense:
Depreciation expense:	3,695	3,609	11,017	11,216
Amortization expense:	308	308	923	2,725
Ball Bonding Equipment
Segment Reporting [Line Items]
Capital expenditures:	145	19	243	76
Depreciation and amortization expense:
Depreciation expense:	254	321	793	985
Amortization expense:	0	0	0	0
Wedge Bonding Equipment
Segment Reporting [Line Items]
Capital expenditures:	313	211	826	291
Depreciation and amortization expense:
Depreciation expense:	266	219	741	674
Amortization expense:	0	0	0	0
Advanced Solutions
Segment Reporting [Line Items]
Capital expenditures:	9,884	32	9,884	124
Depreciation and amortization expense:
Depreciation expense:	244	277	762	793
Amortization expense:	0	0	0	0
APS
Segment Reporting [Line Items]
Capital expenditures:	370	421	1,352	986
Depreciation and amortization expense:
Depreciation expense:	1,142	1,203	3,516	3,909
Amortization expense:	0	0	0	0
All Others
Segment Reporting [Line Items]
Capital expenditures:	20	410	65	1,025
Depreciation and amortization expense:
Depreciation expense:	261	261	865	937
Amortization expense:	216	216	648	2,450
Corporate Expenses
Segment Reporting [Line Items]
Capital expenditures:	1,172	1,640	5,282	5,058
Depreciation and amortization expense:
Depreciation expense:	1,528	1,328	4,340	3,918
Amortization expense:	$ 92	$ 92	$ 275	$ 275