Inventories (Detail) - USD ($) $ in Thousands	May 31, 2019	Feb. 28, 2019
Inventory [Line Items]
Raw materials	$ 3,119	$ 2,973
Work-in-process	370	706
Finished goods	642	631
Inventory, Gross	4,131	4,310
Reserves for obsolescence	(874)	(859)
Inventory, Net	$ 3,257	$ 3,451

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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