SEGMENT INFORMATION (Operating information by segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 02, 2016	Dec. 27, 2014
Net revenue:
Net revenue	$ 108,534	$ 107,438
Cost of sales :
Cost of sales	58,113	52,704
Gross profit :
Gross profit	50,421	54,734
Operating expenses:
Operating expenses	52,126	45,008
Income from operations:
Income from operations	(1,705)	9,726
Equipment [Member]
Net revenue:
Net revenue	92,974	90,956
Income from operations:
Income from operations	(6,426)	5,446
Expendable Tools [Member]
Net revenue:
Net revenue	15,560	16,482
Income from operations:
Income from operations	$ 4,721	$ 4,280