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Organization and Description of Business and Accounting Policies (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 30, 2016 | Jan. 01, 2016 | Jan. 02, 2015
Organization And Description Of Business And Accounting Policies [Line Items] |  |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total | $ 156 | $ 31 | $ (955)
Foreign Currency Transaction Gain (Loss), before Tax | (147) | (949) | (896)
Goodwill | 1,786 | 1,786 |
Advertising Expense | $ 4,000 | $ 2,500 | $ 2,800
Customer Relationships [Member] |  |  |
Organization And Description Of Business And Accounting Policies [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 10 years |  |
Developed technology [Member] | Minimum [Member] |  |  |
Organization And Description Of Business And Accounting Policies [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 3 years |  |
Developed technology [Member] | Maximum [Member] |  |  |
Organization And Description Of Business And Accounting Policies [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 10 years |  |
Patents And Licences [Member] | Minimum [Member] |  |  |
Organization And Description Of Business And Accounting Policies [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 3 years |  |
Patents And Licences [Member] | Maximum [Member] |  |  |
Organization And Description Of Business And Accounting Policies [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 20 years |  |
Sales [Member] | One Customer [Member] |  |  |
Organization And Description Of Business And Accounting Policies [Line Items] |  |  |
Concentration Risk, Percentage | 19.00% |  | 11.00%
Sales [Member] | Two Customer [Member] |  |  |
Organization And Description Of Business And Accounting Policies [Line Items] |  |  |
Concentration Risk, Percentage |  | 15.00% |
Trade Accounts Receivable [Member] | One Customer [Member] |  |  |
Organization And Description Of Business And Accounting Policies [Line Items] |  |  |
Concentration Risk, Percentage | 10.00% |  |
Trade Accounts Receivable [Member] | Two Customer [Member] |  |  |
Organization And Description Of Business And Accounting Policies [Line Items] |  |  |
Concentration Risk, Percentage | 10.00% |  |

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