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Business Segment Information (Tables)
6 Months Ended
Jan. 31, 2018
Business Segment Information [Abstract]  
Summary of operating results of business segments
(in thousands) Telecom
Platform
Services
  net2phone-UCaaS  All Other  Corporate  Total 
Three Months Ended January 31, 2018               
Revenues $387,065  $8,299  $519  $  $395,883 
Income (loss) from operations  4,589   (790)  (1,019)  (3,260)  (480)
Severance  195            195 
Other operating expense           (846)  (846)
                     
Three Months Ended January 31, 2017                    
Revenues $359,924  $7,142  $490  $  $367,556 
Income (loss) from operations  7,187   (464)  82   (3,677)  3,128 
Other operating expense           (889)  (889)
                     
Six Months Ended January 31, 2018                    
Revenues $772,129  $16,087  $1,222  $  $789,438 
Income (loss) from operations  9,150   (1,464)  (1,650)  (6,433)  (397)
Severance  605         30   635 
Other operating expense           (1,625)  (1,625)
                     
Six Months Ended January 31, 2017                    
Revenues $721,435  $14,278  $994  $  $736,707 
Income (loss) from operations  13,732   (639)  172   (4,951)  8,314 
Other operating expense           (1,088)  (1,088)