PROMISSORY NOTES (Detail) - Schedule of Promissory Notes - USD ($)	Jul. 31, 2020	Apr. 30, 2019
Third Promissory Note [Member]
Promissory notes	$ 24,906,446	$ 23,493,003
Fifth Promissory Note [Member]
Promissory notes	2,989,937	2,793,833
Sixth Promissory Note [Member]
Promissory notes	1,487,951	1,302,781
Total [Member]
Promissory notes	$ 29,384,334	$ 27,589,617

Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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