CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME [Abstract]
Net Income	$ 8,045,223	$ 7,133,701	$ 6,139,132
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	242,856	(230,532)	(82,149)
Minimum pension liability adjustment, net of tax of $104,186, $2,483,486 and ($334,943), respectively	(177,397)	(4,228,638)	570,307
Interest rate swap, net of tax of ($23,426), $34,032 and $6,040, respectively	39,888	(57,946)	(10,284)
Other comprehensive income (loss), net of tax	105,347	(4,517,116)	477,874
Total comprehensive income	$ 8,150,570	$ 2,616,585	$ 6,617,006