PROPERTY, PLANT AND EQUIPMENT - Depreciation Expense and Cost of Maintenance and Repairs (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
PROPERTY, PLANT AND EQUIPMENT
Impairment loss	$ 7,900
Depreciation	3,367	$ 3,715	$ 3,513
Costs of maintenance and repairs	$ 2,100	$ 1,900	$ 3,400