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Commitments and Contingencies - Narrative (Details)
1 Months Ended 3 Months Ended
Nov. 08, 2017
USD ($)
Nov. 30, 2019
USD ($)
plaintiff
Feb. 28, 2019
USD ($)
May 31, 2017
USD ($)
Mar. 28, 2020
USD ($)
Mar. 30, 2019
USD ($)
Jul. 01, 2017
USD ($)
Loss Contingencies [Line Items]              
Charge for litigation settlement         $ 4,395,000 $ 0  
1-800 Contacts Matter              
Loss Contingencies [Line Items]              
Amount of litigation settlement       $ 7,000,000.0      
Charge for litigation settlement             $ 7,000,000
Percent of settlement award deposited in escrow account (percent) 50.00%            
Amount of settlement deposited in escrow account $ 3,500,000            
Wage and hours              
Loss Contingencies [Line Items]              
Gross settlement fund to be paid     $ 3,500,000        
Fair Labor Standards Act | Maximum              
Loss Contingencies [Line Items]              
Amount of litigation settlement   $ 895,000          
Number of former employees | plaintiff   6