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OTHER INCOME - Interest Income on Loan Receivable (Details)	1 Months Ended	3 Months Ended		6 Months Ended
	Dec. 31, 2020 USD ($) item	Jun. 30, 2021 USD ($) property	Jun. 30, 2020 property	Jun. 30, 2021 USD ($)
Interest Income on Loan Receivable
Number of properties sold | property		3	3
Real Estate in Houston, TX
Interest Income on Loan Receivable
Number of properties sold | item	2
Term of loan	1 year
Percentage of seller-financing provided by the Company	50.00%
Real Estate in Houston, TX | Other income
Interest Income on Loan Receivable
Interest income on loans		$ 13,000		$ 59,000
Real Estate in Houston, TX | Other receivables
Interest Income on Loan Receivable
Seller-financing provided by the Company	$ 4,612,500	$ 4,612,500		$ 4,612,500

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+ References

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- Definition

The percentage of seller-financing financing provided by the Company

+ References

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The term of the loan provided by the Company.

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Amount, before allowance and fees, of loans and leases receivable. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

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