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Restricted Cash / Restricted Assets (Tables)
12 Months Ended
Apr. 30, 2014
Receivables [Abstract]  
Summary of Restricted Cash / Restricted Assets

A summary of restricted cash / restricted assets as of April 30, 2014 and 2013 is as follows:

 

     April 30,  
     2014      2013  

Current:

     

Landfill closure

   $ 76       $ 76   
  

 

 

    

 

 

 

Non Current:

     

Landfill closure

   $ 681       $ 545