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Note 7 - Inventories - Inventories From Continuing Operations (Details) - USD ($) $ in Thousands | Jan. 31, 2022 | Jan. 31, 2021
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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

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