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Geographic and Product Data (Details) - USD ($) $ in Thousands | 12 Months Ended
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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 + Details
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