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Organization and Description of Business and Accounting Policies (Details 1) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 29, 2017
Dec. 30, 2016
Jan. 01, 2016
Organization And Description Of Business And Accounting Policies [Line Items]      
Balance $ (1,050) $ (1,580) $ (1,070)
Other comprehensive income (loss) (25) 641 (562)
Tax effect (75) (111) 52
Balance (1,150) (1,050) (1,580)
Accumulated Translation Adjustment [Member]      
Organization And Description Of Business And Accounting Policies [Line Items]      
Balance 11 (145) (176)
Other comprehensive income (loss) 387 224 52
Tax effect (120) (68) (21)
Balance 278 11 (145)
Accumulated Defined Benefit Plans Adjustment [Member] | JAPAN      
Organization And Description Of Business And Accounting Policies [Line Items]      
Balance 88 95 121
Other comprehensive income (loss) (6) (9) (38)
Tax effect 6 2 12
Balance 88 88 95
Accumulated Defined Benefit Plans Adjustment [Member] | SWITZERLAND      
Organization And Description Of Business And Accounting Policies [Line Items]      
Balance (1,149) (1,530) (1,015)
Other comprehensive income (loss) (406) 426 (576)
Tax effect 39 (45) 61
Balance $ (1,516) $ (1,149) $ (1,530)