NET INCOME PER UNIT (Details) (USD $)	3 Months Ended		6 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012	Jan. 31, 2013
NET INCOME PER UNIT
Accrued income receivable	$ 3,237,094		$ 3,237,094		$ 218,053
Number of units outstanding	13,120,010	13,120,010	13,120,010	13,120,010