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WARRANTY RESERVES (Tables)
 12 Months Ended
Sep. 30, 2020
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability
A summary of additions to and charges against IEC’s warranty reserves during the period follows: 
 Years Ended
Warranty ReserveSeptember 30,
2020		September 30,
2019
(in thousands)  
Reserve, beginning of period$165 $173 
Provision(14)116 
Warranty costs(51)(124)
Reserve, end of period$100 $165