Summary of Business and Significant Accounting Policies (Self-Insurance) (Details) (USD $)	Jan. 31, 2013	Jan. 31, 2012
Loss Contingencies [Line Items]
Discount rate	0.50%	4.50%
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