NET INCOME PER UNIT (Details) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012	Jan. 31, 2013
NET INCOME PER UNIT
Accrued income receivable	$ 2,408,422		$ 2,408,422		$ 218,053
Number of units outstanding	13,120,010	13,120,010	13,120,010	13,120,010