Operating Leases (Tables)

12 Months Ended

Jul. 31, 2021

Leases [Abstract]

Schedule of operating lease related assets and liabilities recorded on the balance sheets

	As of July 31,
	2021		2020
Right-of- use assets, net	$	745,125	$	620,593
Operating lease liabilities, current		382,298		433,904
Operating lease liabilities, noncurrent		387,307		203,265
Total operating lease liabilities	$	769,605	$	637,169

Schedule of weighted average remaining lease terms and discount rates for all of operating leases for continuing operations

	As of July 31,
	2021			2020
Remaining lease term and discount rate
Weighted average remaining lease term (years)		2.08			1.53
Weighted average discount rate		4.90	%		4.90	%

Schedule of weighted average remaining lease terms and discount rates for all of operating leases for discontinued operations

	2020
Remaining lease term and discount rate
Weighted average remaining lease term (years)		10.21
Weighted average discount rate		4.90	%

Schedule of maturities of lease liabilities

	As of July 31, 2021
2022	$	409,922
2023		252,969
2024 and thereafter		150,468
Total lease payments		813,360
Less: imputed interest		(43,755	)
Present value of lease liabilities	$	769,605

	As of July 31, 2020
2021	$	462,840
2022		198,374
2023 and thereafter		-
Total lease payments		661,214
Less: imputed interest		(24,045	)
Present value of lease liabilities	$	637,169