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Revenue (Details) - Schedule of revenue by type of service - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Jan. 31, 2021
Jan. 31, 2020
Revenue (Details) - Schedule of revenue by type of service [Line Items]        
Total Revenues $ 5,314 $ 2,644 $ 9,076 $ 4,677
Advertising revenue [Member]        
Revenue (Details) - Schedule of revenue by type of service [Line Items]        
Total Revenues 4,399 2,260 7,385 3,927
Paid subscription revenue [Member]        
Revenue (Details) - Schedule of revenue by type of service [Line Items]        
Total Revenues 809 323 1,459 530
Other revenues [Member]        
Revenue (Details) - Schedule of revenue by type of service [Line Items]        
Total Revenues $ 106 $ 61 $ 232 $ 220