SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (Allowance for Doubtful Accounts [Member], USD $)	12 Months Ended
	Jan. 31, 2013		Jan. 31, 2012		Jan. 31, 2011
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 491,138		$ 444,152		$ 204,019
Additions Charged to Costs and Expenses	208,424		56,654		368,983
Deductions	(411,460)	[1]	(9,668)	[1]	(128,850)	[1]
Balance at End of Year	$ 288,102		$ 491,138		$ 444,152

[1] Includes amounts written-off as uncollectible, net of recoveries.