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Organization and Description of Business and Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Jan. 01, 2016	Jan. 02, 2015	Jan. 03, 2014
Organization And Description Of Business And Accounting Policies [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total	$ 31,000	$ (955,000)	$ (1,327,000)
Foreign Currency Transaction Gain (Loss), before Tax	(949,000)	(896,000)	39,000
Goodwill	1,786,000	1,786,000
Advertising Expense	$ 2,500,000	2,800,000	2,100,000
Prior Period Reclassification Adjustment		127,000	$ 203,000
Other Noncurrent Liabilities [Member]
Organization And Description Of Business And Accounting Policies [Line Items]
Prior Period Reclassification Adjustment		$ 75,000
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	15.00%	10.00%	11.00%
Sales [Member] | Two Customer [Member]
Organization And Description Of Business And Accounting Policies [Line Items]
Concentration Risk, Percentage	10.00%		11.00%
Trade Accounts Receivable [Member]
Organization And Description Of Business And Accounting Policies [Line Items]
Concentration Risk, Percentage	10.00%	10.00%

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