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Business Segment and Geographic Information (Tables)
6 Months Ended
Jan. 31, 2022
Business Segment And Geographic Information [Abstract]  
Schedule of net long lived assets and total assets
   United States   Foreign   Total 
   (in thousands) 
Long-lived assets, net:            
January 31, 2022  $8,182   $345   $8,527 
July 31, 2021  $1,900   $399   $2,299 
                
Total assets:               
January 31, 2022  $40,121   $4,860   $44,981 
July 31, 2021  $32,745   $4,732   $37,477