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Inventories
 12 Months Ended
Jan. 31, 2021
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories from continuing operations consisted of the following (in thousands):
 As of January 31,
 20212020
Raw materials$6,905 $7,388 
Finished goods3,466 3,758 
Work in progress2,445 2,720 
Cost of inventories12,816 13,866 
Less allowance for obsolescence(1,363)(1,210)
Net inventories$11,453 $12,656