Summary of Business and Significant Accounting Policies (Self-Insurance) (Details) - USD ($)	Jan. 31, 2020	Jan. 31, 2019
Loss Contingencies [Line Items]
Discount rate	4.00%	4.00%
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