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Pension Plans (Details Textual) (Swiss Plan [Member], USD $)
3 Months Ended
Apr. 04, 2014
Mar. 29, 2013
Swiss Plan [Member]
   
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Defined Benefit Plan, Contributions By Employer $ 69,000 $ 59,000
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year $ 217,000