RELATED PARTY TRANSACTIONS - Fund management fees accrued (Details) - USD ($)	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Related Party Transaction [Line Items]
Gross Fund Management Fee	$ 224,605	$ 368,371
Series Twenty [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	0
Series Twenty One [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	0
Series Twenty Two [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	0
Series Twenty Three [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	0
Series Twenty Four [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	10,299
Series Twenty Five [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	0
Series Twenty Six [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	4,282	13,938
Series Twenty Seven [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	7,635
Series Twenty Eight [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	7,296
Series Twenty Nine [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	6,651	7,260
Series Thirty [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	0
Series Thirty One [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	0
Series Thirty Two [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	15,132	19,794
Series Thirty Three [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	9,777	13,316
Series Thirty Four [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	6,727	11,496
Series Thirty Five [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	9,847
Series Thirty Six [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	2,739
Series Thirty Seven [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	0
Series Thirty Eight [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	2,742
Series Thirty Nine [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	0
Series Forty [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	0	19,612
Series Forty One [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	27,857	34,077
Series Forty Two [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	19,260	23,790
Series Forty Three [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	19,371	24,400
Series Forty Four [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	30,315	48,187
Series Forty Five [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	38,900	59,644
Series Forty Six [Member]
Related Party Transaction [Line Items]
Gross Fund Management Fee	$ 46,333	$ 52,299