Balance Sheet - Continuing Operations - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Jul. 31, 2021	Jan. 31, 2021
Inventories:
Raw materials	$ 7,468	$ 6,905
Finished goods	3,455	3,466
Work in progress	2,404	2,445
Cost of inventories	13,327	12,816
Less allowance for obsolescence	(1,399)	(1,363)
Total inventories, net	$ 11,928	$ 11,453

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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