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Note 7 - Inventories (Tables)
12 Months Ended
Jan. 31, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

As of January 31,

 
  

2022

  

2021

 

Raw materials

 $8,511  $6,905 

Finished goods

  3,806   3,466 

Work in progress

  3,567   2,445 

Cost of inventories

  15,884   12,816 

Less allowance for obsolescence

  (1,878)  (1,363)

Net inventories

 $14,006  $11,453