Financing Arrangements (Details) (USD $)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Financing Arrangements (Textual) [Abstract]
Maximum amount of line of credit	$ 4,250,000
Ratio of total funded debt to EBITDA	2
Maximum amount of letters of credit	10,000,000
Fixed charge coverage ratio	1.25
Ratio of senior funded debt to EBITDA	1.50
Interest rate on borrowings under the Line of Credit.	LIBOR
Borrowings outstanding under Bank financing arrangements	$ 0	$ 0
Expiration date of financing arrangements	May 31, 2013
Interest rate	2.25%