Contingencies (Details Textual) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Loss Contingencies [Line Items]
Liability retention losses	$ 30,000,000
Expected future losses	$ 1,650,000	$ 2,050,000
Estimated payout period	5 years
Discount rate	2.00%	2.00%
Product and General Liability [Member]
Loss Contingencies [Line Items]
Self insurance reserve	$ 250,000
Workers Compensation [Member]
Loss Contingencies [Line Items]
Self insurance reserve	250,000
Automobile Losses [Member]
Loss Contingencies [Line Items]
Self insurance reserve	$ 50,000