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Inventories (Details) - USD ($) $ in Thousands	Feb. 28, 2025	Feb. 29, 2024
Inventories
Finished goods	$ 488	$ 552
Work in process	318	333
Raw materials	14	34
Allowance for inventory write-down	(738)	(817)
Inventory net	$ 82	$ 102

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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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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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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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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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