Leases - Schedule of Operating Lease Liabilities (Details) - USD ($)	Jul. 31, 2020	May 01, 2019
Leases [Abstract]
Operating office leases	$ 13,312,573
Reduction of lease liabilities	(5,092,253)
Present value of operating lease obligations	$ 8,220,320	$ 8,000,000

Present value of lessee's discounted obligation for lease payments from operating lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

Name:	us-gaap_OperatingLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant