SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Income Taxes and Deferred Tax Liability (Details) - USD ($)	6 Months Ended	12 Months Ended
	Dec. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2013
Income Taxes and Deferred Tax Liability [Abstract]
Percentage of excise tax on catch-up distributions paid in the subsequent year		4.00%
Income tax provision (benefit)	$ 0		$ 0	$ (13,348)
Uncertain tax positions		$ 0	$ 0
Minimum [Member]
Income Taxes and Deferred Tax Liability [Abstract]
Percentage of taxable income annual distributions		90.00%
Maximum [Member]
Income Taxes and Deferred Tax Liability [Abstract]
Percentage of taxable income annual distributions		100.00%
Mackenzie Realty Capital, Inc [Member]
Income Taxes and Deferred Tax Liability [Abstract]
Built-in gain tax adjustments				(13,348)
Income tax provision (benefit)				$ 13,348
Net unrealized built-in gains					$ 239,595
Estimated tax liability					$ 95,431
TRS and MacKenzie NY 2 [Member] | Tax Year 2020 [Member]
Income Taxes and Deferred Tax Liability [Abstract]
Income tax provision (benefit)		$ 0
Taxable income		0
TRS and MacKenzie NY 2 [Member] | Tax Year 2021 [Member]
Income Taxes and Deferred Tax Liability [Abstract]
Income tax provision (benefit)		0
Taxable income		$ 0