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Product Warranty Obligation (Tables)
 3 Months Ended
Dec. 31, 2018
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Accrual
The following table summarizes the activity associated with the product warranty accrual (in thousands) and is included on our Condensed Consolidated Balance Sheets within current liabilities:
 
Balance at
 
Warranties
 
Settlements
 
Balance at
Period
October 1
 
issued
 
made
 
December 31
Three months ended December 31, 2018
$
1,172

 
$
72

 
$
(104
)
 
$
1,140

Three months ended December 31, 2017
$
987

 
$
354

 
$
(177
)
 
$
1,164