Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Jan. 31, 2019	Jan. 31, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 5,446	$ 5,099
Finished goods	5,229	6,185
Work in progress	1,322	1,247
Cost of inventories	11,997	12,531
Less allowance for obsolescence	(1,223)	(1,675)
Net inventories	$ 10,774	$ 10,856

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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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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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

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