SEGMENT INFORMATION (Capital expenditures, depreciation and amortization expense by segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Segment Reporting, Other Significant Reconciling Item [Line Items]
Property, Plant and Equipment, Additions	$ 2,325	$ 4,942
Depreciation and amortization expense:
Depreciation expense	2,942	2,892
Amortization expense	1,817	1,877
Capital Equipment [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Property, Plant and Equipment, Additions	1,075	2,184
Depreciation and amortization expense:
Depreciation expense	1,543	1,738
Amortization expense	975	1,007
Aftermarket Products and Services (APS) [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Property, Plant and Equipment, Additions	1,250	2,758
Depreciation and amortization expense:
Depreciation expense	1,399	1,154
Amortization expense	$ 842	$ 870