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Fair Values of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Apr. 02, 2021
Dec. 31, 2020
Liabilities    
Contingent considerations - Long-term $ 4,999 $ 7,276
Fair Value Measurements Recurring    
Assets    
Cash equivalents 18,079 11,047
Assets, fair value 18,087 11,074
Liabilities    
Liabilities, fair value 8,776 11,556
Fair Value Measurements Recurring | Prepaid Expenses and Other Current Assets    
Assets    
Foreign currency forward contracts 8 27
Fair Value Measurements Recurring | Accrued Expenses and Other Current Liabilities    
Liabilities    
Contingent considerations - Current 3,711 4,280
Foreign currency forward contracts 66  
Fair Value Measurements Recurring | Other Liabilities    
Liabilities    
Contingent considerations - Long-term 4,999 7,276
Fair Value Measurements Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets    
Cash equivalents 18,079 11,047
Assets, fair value 18,079 11,047
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2)    
Assets    
Assets, fair value 8 27
Liabilities    
Liabilities, fair value 66  
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Prepaid Expenses and Other Current Assets    
Assets    
Foreign currency forward contracts 8 27
Fair Value Measurements Recurring | Significant Other Observable Inputs (Level 2) | Accrued Expenses and Other Current Liabilities    
Liabilities    
Foreign currency forward contracts 66  
Fair Value Measurements Recurring | Significant Other Unobservable Inputs (Level 3)    
Liabilities    
Liabilities, fair value 8,710 11,556
Fair Value Measurements Recurring | Significant Other Unobservable Inputs (Level 3) | Accrued Expenses and Other Current Liabilities    
Liabilities    
Contingent considerations - Current 3,711 4,280
Fair Value Measurements Recurring | Significant Other Unobservable Inputs (Level 3) | Other Liabilities    
Liabilities    
Contingent considerations - Long-term $ 4,999 $ 7,276