Summary of Business and Significant Accounting Policies (Property, Plant, and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Property, Plant and Equipment [Line Items]
Repair and maintenance	$ 1,800	$ 2,000
Property, plant and equipment acquired and not yet paid at end of year	493	634
Asset retirement obligations	212	205	$ 198
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