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Goodwill (Tables)
12 Months Ended
Jul. 31, 2018
Goodwill [Abstract]  
Schedule of change in carrying amount of goodwill by operating segment

(in thousands) Telecom 
& Payment 
Services
 
Balance as of July 31, 2016 $11,218 
Foreign currency translation adjustments  108 
Balance as of July 31, 2017  11,326 
Foreign currency translation adjustments  (11)
Balance as of July 31, 2018 $11,315