SUBSEQUENT EVENTS (Details)		1 Months Ended		3 Months Ended
	Apr. 25, 2022 USD ($) property	May 31, 2022 $ / item	May 06, 2022 USD ($) $ / item shares	Mar. 31, 2022 USD ($) $ / item shares	Mar. 31, 2021 USD ($) $ / item	Dec. 31, 2021 $ / item	Sep. 30, 2021 $ / item	Jun. 30, 2021 $ / item
Subsequent events
Total cost of repurchase				$ 1,337,814
Units required to be repurchased (in shares) | shares				589
Quarterly distribution per unit approved (in dollars per unit) | $ / item				9.60
Quarterly distribution per unit (in dollars per unit) | $ / item				0.32	0.32	0.32	0.32	0.32
Special distribution per depository receipt (in dollars per receipt) | $ / item				1.28
Special distribution per unit (in dollars per unit) | $ / item				38.40
Payment of debt				$ 600,190	$ 552,575
Remaining loan balance				372,590,000
Subsequent event
Subsequent events
Number of depository receipts repurchased | shares			9,276
Repurchase price of depository receipts (in dollars per receipt) | $ / item			82.09
Price per unit of depository receipts | $ / item			2,462.70
Total cost of repurchase			$ 762,172
Quarterly distribution per unit approved (in dollars per unit) | $ / item		9.60
Quarterly distribution per unit (in dollars per unit) | $ / item		0.32
Special distribution per depository receipt (in dollars per receipt) | $ / item		38.40
Special distribution per unit (in dollars per unit) | $ / item		1.28
Subsequent event | Rate Lock Agreement [Member]
Subsequent events
Interest rate lock deposit	$ 1,599,100
Loan amount	$ 79,955,000
Interest rate (as a percent)	4.33%
Payment of debt	$ 37,147,000
Number of properties | property	4
Mortgage prepayment penalties	$ 1,895,000
Remaining loan balance	$ 40,913,000
Class B
Subsequent events
Total cost of repurchase				254,118
Value of units required to be repurchased				254,118
Class B | Subsequent event
Subsequent events
Units required to be repurchased (in shares) | shares			73
Value of units required to be repurchased			$ 180,838
General Partnership
Subsequent events
Total cost of repurchase				13,375
Value of units required to be repurchased				$ 13,375
General Partnership | Subsequent event
Subsequent events
Units required to be repurchased (in shares) | shares			4
Value of units required to be repurchased			$ 9,518
Class A
Subsequent events
Number of depository receipts repurchased | shares				14,132
Repurchase price of depository receipts (in dollars per receipt) | $ / item				75.71
Total cost of repurchase				$ 1,070,321