Inventories (Details) - USD ($) $ in Thousands	Apr. 01, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 37,486	$ 38,511
Work-in-process	12,438	10,138
Finished goods	11,146	9,266
Demo and consigned inventory	694	1,651
Total inventories	$ 61,764	$ 59,566

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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.

+ References

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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.

+ References

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Carrying amount, net of valuation reserves and allowances, as of the balance sheet date of inventories not otherwise specified in the taxonomy.

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