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Inventories - Summary of Inventories (Details) - USD ($) $ in Thousands	May 02, 2021	Jan. 31, 2021
Inventory Disclosure [Abstract]
Raw materials	$ 3,566	$ 2,936
Work in progress	67,192	59,523
Finished goods	23,161	25,035
Inventories	$ 93,919	$ 87,494

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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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-Topic 210
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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 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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