Revenue (Details) - Schedule of revenue by type of service - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Revenue (Details) - Schedule of revenue by type of service [Line Items]
Total Revenues	$ 5,252	$ 2,079	$ 14,328	$ 6,756
Advertising revenue [Member]
Revenue (Details) - Schedule of revenue by type of service [Line Items]
Total Revenues	4,227	1,501	11,612	5,428
Paid subscription revenue [Member]
Revenue (Details) - Schedule of revenue by type of service [Line Items]
Total Revenues	899	455	2,358	985
Other revenues [Member]
Revenue (Details) - Schedule of revenue by type of service [Line Items]
Total Revenues	$ 126	$ 123	$ 358	$ 343