Investments in Real Estate-Related Assets - Result of Operation for Investments in Real Estated Related Assets (Parenthetical) (Detail)	Apr. 30, 2019 USD ($)
Single Purpose Limited Liability Company [Member] \| CO Property [Member]
Real Estate Properties [Line Items]
Beneficial interests acquired, purchase price	$ 190,057

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_EquityMethodInvestmentAggregateCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant