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Inventories, net (Tables)
9 Months Ended
Oct. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of inventory
   

October 31,

2019

   

January 31,

2019

 
             
Raw materials   $ 17,230     $ 14,986  
Work-in-process     441       987  
Finished goods   $ 30,126       26,392  
    $ 47,797     $ 42,365