Leases (Details) - Schedule of supplemental disclosures related to the Company's operating leases - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Schedule of supplemental disclosures related to the Company's operating leases [Abstract]
Operating lease cost	$ 697	$ 712	$ 1,425	$ 1,423
Short-term lease cost	130	75	195	133
Total lease cost	827	787	1,620	1,556
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 672	$ 685	$ 1,382	$ 1,369