Inventories (Details) - USD ($) $ in Thousands	Dec. 02, 2017	Mar. 04, 2017
Components of inventories
Raw materials	$ 35,565	$ 22,761
Work-in-process	24,919	16,154
Finished goods	34,951	29,372
Costs and earnings in excess of billings on uncompleted contracts	2,627	5,122
Total inventories	$ 98,062	$ 73,409

Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings which is expected to be collected within one year or the normal operating cycle, if longer.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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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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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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