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PROPERTY, PLANT AND EQUIPMENT - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Property, plant and equipment
Property and equipment, gross	$ 38,723	$ 37,525
Less - accumulated depreciation	18,362	14,986
Property, plant and equipment, net	20,361	22,539
Land and improvements
Property, plant and equipment
Property and equipment, gross	863	863
Building and improvements
Property, plant and equipment
Property and equipment, gross	5,868	5,696
Furniture, machinery and equipment
Property, plant and equipment
Property and equipment, gross	19,132	18,900
Trucks, trailers and other vehicles
Property, plant and equipment
Property and equipment, gross	5,315	5,213
Project development costs (Note 3)
Property, plant and equipment
Property and equipment, gross	$ 7,545	$ 6,853

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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