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Fair Value Measurements - Summary of the Carrying Value and Fair Value of Convertible Subordinated Notes (Details) - Fair Value Inputs Level 3 - USD ($)
$ in Thousands
Jun. 25, 2021
Dec. 25, 2020
Senior Notes | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible Notes $ 200,000 $ 150,000
Senior Notes | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible Notes 203,115 163,204
Unsecured Note | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible Notes 4,000 4,000
Unsecured Note | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible Notes $ 4,063 $ 4,290