Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations - Narrative (Details)

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Discontinued Operations - Narrative (Details) - AutoMD - Discontinued Operations, Disposed of by Means Other than Sale - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Jul. 01, 2017
Jul. 02, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Severance costs $ 221   $ 221  
Contract termination cost 164   164  
Loss from operations 173   173  
Net loss attributable to noncontrolling interest $ 59 $ 253 $ 59 $ 515