INVESTMENTS IN OPERATING PARTNERSHIPS - Dispositions by series (Details)	6 Months Ended
	Sep. 30, 2019 USD ($) item	Sep. 30, 2018 USD ($) item
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item	6	15
Sale of Underlying Operating Partnership | item	9	4
Partnership Proceeds from Disposition *	$ 11,850,561	$ 2,580,529
Gain on Disposition	11,850,663	$ 2,619,630
Series Twenty [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item		1
Partnership Proceeds from Disposition *	0	$ 155,337
Gain on Disposition		155,337
Series Twenty One [Member]
Dispositions By Series Disclosure
Partnership Proceeds from Disposition *	0	0
Series Twenty Two [Member]
Dispositions By Series Disclosure
Partnership Proceeds from Disposition *	0	0
Series Twenty Three [Member]
Dispositions By Series Disclosure
Partnership Proceeds from Disposition *	0	0
Series Twenty Four [Member]
Dispositions By Series Disclosure
Partnership Proceeds from Disposition *	0	0
Series Twenty Five [Member]
Dispositions By Series Disclosure
Partnership Proceeds from Disposition *	0	$ 0
Series Twenty Six [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item		1
Partnership Proceeds from Disposition *	$ 0	$ 10,500
Gain on Disposition		10,500
Series Twenty Seven [Member]
Dispositions By Series Disclosure
Sale of Underlying Operating Partnership	1
Partnership Proceeds from Disposition *	$ 776,922	$ 0
Gain on Disposition	$ 776,922
Series Twenty Eight [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred	1	1
Partnership Proceeds from Disposition *	$ 7,100	$ 8,500
Gain on Disposition	7,100	$ 8,500
Series Twenty Nine [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item		2
Partnership Proceeds from Disposition *	0	$ 122,994
Gain on Disposition		$ 123,094
Series Thirty [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item		3
Partnership Proceeds from Disposition *	$ 0	$ 25,006
Gain on Disposition		$ 41,555
Series Thirty One [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item		2
Sale of Underlying Operating Partnership	1
Partnership Proceeds from Disposition *	$ 618,900	$ 47,000
Gain on Disposition	618,900	$ 69,452
Series Thirty Two [Member]
Dispositions By Series Disclosure
Sale of Underlying Operating Partnership | item		1
Partnership Proceeds from Disposition *	$ 0	$ 487,880
Gain on Disposition		487,880
Series Thirty Three [Member]
Dispositions By Series Disclosure
Sale of Underlying Operating Partnership	1
Partnership Proceeds from Disposition *	$ 1,442,632	0
Gain on Disposition	$ 1,442,632
Series Thirty Four [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred	1
Partnership Proceeds from Disposition *	$ 257,500	0
Gain on Disposition	$ 257,500
Series Thirty Five [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred	1
Partnership Proceeds from Disposition *	$ 141,000	$ 0
Gain on Disposition	$ 141,000
Series Thirty Six [Member]
Dispositions By Series Disclosure
Sale of Underlying Operating Partnership	1	1
Partnership Proceeds from Disposition *	$ 476,325	$ 243,163
Gain on Disposition	476,325	$ 243,163
Series Thirty Seven [Member]
Dispositions By Series Disclosure
Sale of Underlying Operating Partnership | item		1
Partnership Proceeds from Disposition *	$ 0	$ 1,020,649
Gain on Disposition		$ 1,020,649
Series Thirty Eight [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred	1	1
Sale of Underlying Operating Partnership	1
Partnership Proceeds from Disposition *	$ 1,463,974	$ 7,000
Gain on Disposition	1,463,974	7,000
Series Thirty Nine [Member]
Dispositions By Series Disclosure
Partnership Proceeds from Disposition *	$ 0	$ 0
Series Forty [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred	1	1
Sale of Underlying Operating Partnership	1
Partnership Proceeds from Disposition *	$ 2,553,903	$ 44,500
Gain on Disposition	2,554,005	$ 44,500
Series Forty One [Member]
Dispositions By Series Disclosure
Sale of Underlying Operating Partnership | item		1
Partnership Proceeds from Disposition *	0	$ 14,000
Gain on Disposition		$ 14,000
Series Forty Two [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item		1
Partnership Proceeds from Disposition *	$ 0	$ 42,500
Gain on Disposition		$ 42,500
Series Forty Three [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred	1	1
Sale of Underlying Operating Partnership	1
Partnership Proceeds from Disposition *	$ 1,255,582	$ 9,000
Gain on Disposition	$ 1,255,582	9,000
Series Forty Four [Member]
Dispositions By Series Disclosure
Sale of Underlying Operating Partnership	2
Partnership Proceeds from Disposition *	$ 2,856,723	$ 0
Gain on Disposition	2,856,723
Series Forty Five [Member]
Dispositions By Series Disclosure
Operating Partnership Interest Transferred | item		1
Partnership Proceeds from Disposition *	0	$ 342,500
Gain on Disposition		342,500
Series Forty Six [Member]
Dispositions By Series Disclosure
Partnership Proceeds from Disposition *	$ 0	$ 0