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Inventories (Details) - USD ($)
$ in Thousands
Jul. 31, 2022
Jan. 31, 2022
Inventories    
Raw materials $ 24,912 $ 20,231
Work-in-process 996 626
Finished goods 34,409 29,910
Excess and obsolete reserves (3,511) (3,056)
Inventories, net $ 56,806 $ 47,711