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OTHER LONG-TERM ASSETS (Tables)
12 Months Ended
Sep. 30, 2018
OTHER LONG-TERM ASSETS [Abstract]  
Other Long-Term Assets
Other long-term assets consisted of the following:

 
 
September 30,
 
 
 
2018
  
2017
 
Auction rate securities (ARS)
 
$
-
  
$
5,319
 
Long-term contract asset
  
1,548
   
2,115
 
Other long-term assets
  
1,979
   
2,154
 
Other long-term investments
  
1,137
   
929
 
Total
 
$
4,664
  
$
10,517