Revenue Revenue, Remaining Performance Obligation (Details) $ in Thousands	Sep. 29, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-09-30
Revenue, Remaining Performance Obligation, Amount	$ 2,164
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-12-30
Revenue, Remaining Performance Obligation, Amount	7,399
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-04
Revenue, Remaining Performance Obligation, Amount	6,118
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-03
Revenue, Remaining Performance Obligation, Amount	5,858
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-02
Revenue, Remaining Performance Obligation, Amount	5,633
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Revenue, Remaining Performance Obligation, Amount	73,579
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: (nil)
Revenue, Remaining Performance Obligation, Amount	$ 100,751