EMPLOYEE BENEFIT PLANS (Details) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
Components of net periodic pension (income) cost [Abstract]
Service cost	$ 56,035	$ 51,442	$ 168,105	$ 154,284
Interest cost	272,218	280,364	816,654	841,128
Expected return on plan assets	(304,822)	(350,481)	(914,466)	(1,051,462)
Recognized net actuarial loss	109,991	52,443	329,973	157,386
Net periodic benefit cost	133,422	33,768	400,266	101,336
Company contributions during the period			1,650,683	2,974,850
Expected additional company contributions in current fiscal year	$ 23,561		$ 23,561