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Goodwill (Tables)
12 Months Ended
Jul. 31, 2020
Disclosure Text Block Supplement [Abstract]  
Schedule of change in carrying amount of goodwill by operating segment
(in thousands)  Telecom
& Payment
Services
   net2phone   Total 
Balance at July 31, 2018  $11,315   $
   $11,315 
Foreign currency translation adjustments   (106)   
    (106)
Balance at July 31, 2019   11,209    
    11,209 
Acquisition   
    1,437    1,437 
Foreign currency translation adjustments   130    82    212 
Balance at July 31, 2020  $11,339   $1,519   $12,858