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Geographic and Product Data (Details) - USD ($) $ in Thousands		12 Months Ended
		Jan. 01, 2016	Jan. 02, 2015	Jan. 03, 2014
Geographic And Sales [Line Items]
Net sales		$ 77,123	$ 74,987	$ 72,215
Japan [Member]
Geographic And Sales [Line Items]
Net sales		16,982	19,107	17,666
China [Member]
Geographic And Sales [Line Items]
Net sales		12,571	9,370	8,618
United States [Member]
Geographic And Sales [Line Items]
Net sales		10,904	11,117	12,851
Korea [Member]
Geographic And Sales [Line Items]
Net sales		8,061	6,563	7,743
Spain [Member]
Geographic And Sales [Line Items]
Net sales		5,617	5,562	4,867
Other [Member]
Geographic And Sales [Line Items]
Net sales	[1]	$ 22,988	$ 23,268	$ 20,470
[1] No other location individually exceeds 5% of total sales.

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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