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Concentration of Customers and Gain on Sale of Rights in Wireless Spectrum (Tables)
9 Months Ended
Apr. 30, 2014
Concentration of Customers and Gain on Sale of Rights in Wireless Spectrum [Abstract]  
Revenues from transactions with a single customer
 
 
Nine Months Ended
April 30,
 
 
2014
 
2013
 
 
(in thousands)
 
TelePacific Communications
na
 $124