REVENUE RECOGNITION - Schedule of Net Sales from Contracts with Customers by Market Sector (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 28, 2018	Dec. 29, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 35,441	$ 21,156
Aerospace & Defense
Disaggregation of Revenue [Line Items]
Net sales	18,712
Medical
Disaggregation of Revenue [Line Items]
Net sales	9,159
Industrial
Disaggregation of Revenue [Line Items]
Net sales	7,570
Point in Time
Disaggregation of Revenue [Line Items]
Net sales	17,264
Point in Time | Aerospace & Defense
Disaggregation of Revenue [Line Items]
Net sales	7,565
Point in Time | Medical
Disaggregation of Revenue [Line Items]
Net sales	3,685
Point in Time | Industrial
Disaggregation of Revenue [Line Items]
Net sales	6,014
Over Time
Disaggregation of Revenue [Line Items]
Net sales	18,177
Over Time | Aerospace & Defense
Disaggregation of Revenue [Line Items]
Net sales	11,147
Over Time | Medical
Disaggregation of Revenue [Line Items]
Net sales	5,474
Over Time | Industrial
Disaggregation of Revenue [Line Items]
Net sales	$ 1,556