NATURE OF BUSINESS AND ORGANIZATION - SCF (Details) - USD ($)	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Royalties received	$ 2,997,561	$ 366,840
Interest received	16,755	3,545
Expenses paid	(299,716)	(301,911)
Net cash from operating activities	2,714,600	68,474
Maturities of U.S. Government securities	15,853,108	82,628
Distributions to unitholders	(15,481,612)	(1,836,801)
Net change in cash and cash equivalents	2,714,644	(1,685,699)
Cash and cash equivalents, beginning of period	314,835	13,695,168
Cash and cash equivalents, end of period	3,029,479	12,009,469
Net income	6,315,848	4,471,925
Increase in accrued income receivable	(2,338,568)	(1,186,953)
Increase in contract asset	(1,331,163)	(1,110,218)
Increase in prepaid expense	(14,511)	(11,369)
Increase in accrued expenses	82,994	4,504
Decrease in contract liability		(2,099,415)
Distributions declared and payable	5,904,005	7,216,006
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net income		1,110,218
Increase in contract asset		(1,110,218)
Decrease in deferred royalty revenue		2,099,415
Decrease in contract liability		(2,099,415)
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Royalties received		366,840
Interest received		3,545
Expenses paid		(301,911)
Net cash from operating activities		68,474
Maturities of U.S. Government securities		82,628
Distributions to unitholders		(1,836,801)
Net change in cash and cash equivalents		(1,685,699)
Cash and cash equivalents, beginning of period	$ 314,835	13,695,168
Cash and cash equivalents, end of period		12,009,469
Net income		3,361,707
Increase in accrued income receivable		(1,186,953)
Increase in prepaid expense		(11,369)
Increase in accrued expenses		4,504
Decrease in deferred royalty revenue		(2,099,415)
Distributions declared and payable		$ 7,216,006