NET INCOME PER UNIT (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Jan. 31, 2017
NET INCOME PER UNIT
Accrued income receivable	$ 2,837,160		$ 2,837,160		$ 45,045
Number of units outstanding	13,120,010	13,120,010	13,120,010	13,120,010