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Inventory (Schedule of Inventory) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Inventory [Line Items]
Raw materials	$ 1,922	$ 498
Work in process	6,170	3,997
Finished goods	3,836	2,854
Total	11,928	7,349
Inventory write-down	1,100	1,200	$ 500
Inventory
Inventory [Line Items]
Total	9,838	6,657
Inventory included in Other long-term assets
Inventory [Line Items]
Total	$ 2,090	$ 692

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- Definition

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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