NET INCOME PER UNIT (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
NET INCOME PER UNIT
Accrued income receivable	$ 6,220,864		$ 6,220,864		$ 45,045
Number of units outstanding	13,120,010	13,120,010	13,120,010	13,120,010