Contingencies (Details Textual) (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Loss Contingencies [Line Items]
Liability retention losses	$ 30,000,000
Expected future losses	2,425,000	2,985,000
Estimated payout period	5 years
Discount rate	0.50%	0.50%
Product and General Liability [Member]
Loss Contingencies [Line Items]
Self insurance reserve	250,000	250,000
Workers Compensation [Member]
Loss Contingencies [Line Items]
Self insurance reserve	250,000	250,000
Automobile Losses [Member]
Loss Contingencies [Line Items]
Self insurance reserve	$ 50,000	$ 50,000