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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Foreign currency exchange forward contracts - Fair value, measurements, recurring - USD ($)
$ in Thousands
Mar. 28, 2020
Dec. 28, 2019
Liabilities    
Derivative liability $ (52) $ (159)
Level 1    
Liabilities    
Derivative liability 0 0
Level 2    
Liabilities    
Derivative liability $ (52) $ (159)