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Stock-Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 02, 2019
Apr. 03, 2018
May 31, 2013
IPO [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Maximum shares reserved for issuance     3,500,000
Employee Stock Option [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Allocated Share-based Compensation Expense $ 726 $ 580  
Capitalized stock based compensation expense $ 11 $ 12