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Summary of Accrual Activities by Components Related to Company's Restructuring Charges (Details) $ in Thousands | 9 Months Ended
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Sep. 28, 2018 USD ($)
Restructuring Cost And Reserve [Line Items] |
Accrued expense beginning balance | $ 806
Restructuring charges | 1,125
Cash payments | (512)
Non-cash write-offs and other adjustments | (11)
Accrued expense ending balance | 1,408
Severance |
Restructuring Cost And Reserve [Line Items] |
Accrued expense beginning balance | 39
Restructuring charges | 1,082
Cash payments | (187)
Non-cash write-offs and other adjustments | (11)
Accrued expense ending balance | 923
Facility |
Restructuring Cost And Reserve [Line Items] |
Accrued expense beginning balance | 763
Cash payments | (282)
Accrued expense ending balance | 481
Other Restructuring Charges |
Restructuring Cost And Reserve [Line Items] |
Accrued expense beginning balance | 4
Restructuring charges | 43
Cash payments | (43)
Accrued expense ending balance | $ 4

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