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Balance Sheet - Schedule of Inventories (Detail) - USD ($)
$ in Thousands
Oct. 31, 2020
Jan. 31, 2020
Inventories:    
Raw materials $ 7,019 $ 7,388
Finished goods 3,436 3,758
Work in progress 2,698 2,720
Cost of inventories 13,153 13,866
Less allowance for obsolescence (1,273) (1,210)
Total inventories, net $ 11,880 $ 12,656