Summary of Business and Significant Accounting Policies (Property, Plant, and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Property, Plant and Equipment [Line Items]
Repair and maintenance	$ 1,959	$ 1,727
Property, plant and equipment included in AP and accrued expense	189	113
Asset retirement obligations	198	192	$ 186
Impairment of long-lived asset	$ 0	$ 0
Land Improvements [Member] | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Land Improvements [Member] | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	25 years
Buildings and building improvements [Member] | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Buildings and building improvements [Member] | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	40 years
Machinery and equipment [Member] | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Machinery and equipment [Member] | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years