MARKET SECTORS AND MAJOR CUSTOMERS - Summary of Sales by Sector (Details) - Sales Revenue	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Concentration Risk [Line Items]
Percentage of sales by sector (percent)	100.00%	100.00%
Aerospace and Defense
Concentration Risk [Line Items]
Percentage of sales by sector (percent)	60.00%	60.00%
Medical
Concentration Risk [Line Items]
Percentage of sales by sector (percent)	26.00%	22.00%
Industrial
Concentration Risk [Line Items]
Percentage of sales by sector (percent)	14.00%	18.00%