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Revenue (Details) - Schedule of revenue by type of service - USD ($)
$ in Thousands
 3 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Revenue (Details) - Schedule of revenue by type of service [Line Items]    
Total Revenues $ 3,762 $ 2,033
Advertising revenue [Member]    
Revenue (Details) - Schedule of revenue by type of service [Line Items]    
Total Revenues 2,986 1,667
Paid subscription revenue [Member]    
Revenue (Details) - Schedule of revenue by type of service [Line Items]    
Total Revenues 650 207
Other revenues [Member]    
Revenue (Details) - Schedule of revenue by type of service [Line Items]    
Total Revenues $ 126 $ 159