Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details 4)

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Income Taxes (Details 4) - USD ($)
$ in Thousands
Dec. 30, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
Valuation allowance $ (5,177) $ (3,742)
AMT Credit carryforwards that are expected to be fully refunded 1,600  
Unrecognized tax benefits that would impact effective tax rate if recognized $ 300