REVENUE RECOGNITION - Schedule of Net Sales from Contracts with Customers by Market Sector (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 29, 2019	Mar. 30, 2018	Mar. 29, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 37,294	$ 31,768	$ 72,735
Aerospace & Defense
Disaggregation of Revenue [Line Items]
Net sales	23,122		41,459
Medical
Disaggregation of Revenue [Line Items]
Net sales	7,086		16,729
Industrial
Disaggregation of Revenue [Line Items]
Net sales	7,086		14,547
Point in Time
Disaggregation of Revenue [Line Items]
Net sales	19,530		36,360
Point in Time | Aerospace & Defense
Disaggregation of Revenue [Line Items]
Net sales	11,075		19,002
Point in Time | Medical
Disaggregation of Revenue [Line Items]
Net sales	3,872		8,040
Point in Time | Industrial
Disaggregation of Revenue [Line Items]
Net sales	4,583		9,318
Over Time
Disaggregation of Revenue [Line Items]
Net sales	17,764		36,375
Over Time | Aerospace & Defense
Disaggregation of Revenue [Line Items]
Net sales	12,047		22,457
Over Time | Medical
Disaggregation of Revenue [Line Items]
Net sales	3,214		8,689
Over Time | Industrial
Disaggregation of Revenue [Line Items]
Net sales	$ 2,503		$ 5,229