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Inventories (Tables)
12 Months Ended
Sep. 30, 2012
Inventory Disclosure [Abstract]  
Components of inventory
                 
    September 30,  
    2012     2011  

Product

  $ 30,786     $ 64,907  

Parts and equipment

    16,679       15,629  
   

 

 

   

 

 

 
    $ 47,465     $ 80,536