REVENUES - Additional Information (Details) - customer	3 Months Ended
Jul. 31, 2020	Jul. 31, 2019
REVENUES:
Percentage of real estate land sales	100.00%	100.00%
Number of customers	4	5

Percentage of stated interest rate for receivables from retail land sales.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 976
-SubTopic 310
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6497875&loc=d3e22274-108663

Name:	us-gaap_RetailLandSalesReceivablesStatedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant