INVESTMENTS IN OPERATING PARTNERSHIPS - Dispositions by series (Details)	3 Months Ended
	Jun. 30, 2020 USD ($) item	Jun. 30, 2019 USD ($) item
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item	3	1
Sale of Underlying Operating Partnership | item	0	5
Fund Proceeds from Disposition | $	$ 87,000	$ 4,884,617
Gain on Disposition | $	$ 87,000	4,884,617
Series Twenty Nine [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item	1
Sale of Underlying Operating Partnership | item	0
Fund Proceeds from Disposition | $	$ 9,500	$ 0
Gain on Disposition | $	9,500
Series Thirty One [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item		0
Sale of Underlying Operating Partnership | item		1
Fund Proceeds from Disposition | $	0	$ 587,469
Gain on Disposition | $		$ 587,469
Series Thirty Six [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item		0
Sale of Underlying Operating Partnership | item		1
Fund Proceeds from Disposition | $	0	$ 476,325
Gain on Disposition | $		$ 476,325
Series Thirty Eight [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item		1
Sale of Underlying Operating Partnership | item		1
Fund Proceeds from Disposition | $	$ 0	$ 1,463,974
Gain on Disposition | $		$ 1,463,974
Series Forty Three [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item	1	0
Sale of Underlying Operating Partnership | item	0	1
Fund Proceeds from Disposition | $	$ 9,000	$ 1,060,582
Gain on Disposition | $	9,000	$ 1,060,582
Series Forty Four [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item		0
Sale of Underlying Operating Partnership | item		1
Fund Proceeds from Disposition | $	$ 0	$ 1,296,267
Gain on Disposition | $		1,296,267
Series Forty Six [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item	1
Sale of Underlying Operating Partnership | item	0
Fund Proceeds from Disposition | $	$ 68,500	$ 0
Gain on Disposition | $	$ 68,500