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Long-Term Debt and Short-Term Borrowings - Additional Informations (Details)
9 Months Ended
Sep. 17, 2020
USD ($)
$ / shares
Sep. 24, 2020
USD ($)
Sep. 22, 2020
Debt Instrument [Line Items]      
Net proceeds from the sale of the Convertible Notes   $ 100,050,000  
Capped call transactions   $ 16,908,000  
Threshold percentage of conversion price on each applicable trading day   130.00%  
Last reported sale price | $ / shares $ 8.99    
Cap price of capped call transactions | $ / shares 17.98    
Strike price of capped call transactions | $ / shares $ 11.0128    
Initial conversion premium 100.00%    
Convertible Senior Notes due 2025      
Debt Instrument [Line Items]      
Aggregate principal amount $ 100,050,000 $ 1,000  
Net proceeds from the sale of the Convertible Notes 95,487,000    
Capped call transactions $ 16,908,000    
Effective interest rate   11.25%  
Equity component of the Convertible Notes included in additional paid-in capital, before tax   $ 23,426,000  
Equity component of the Convertible Notes included in additional paid-in capital, net of tax and issuance costs   $ 16,522,000  
Interest rate 5.00%   5.00%
Threshold number of trading days during a period of 30 consecutive trading days   5  
Threshold number of consecutive trading days   5  
Threshold percentage of conversion price on each applicable trading day   98.00%  
Initial conversion rate 90.8038    
Initial conversion price | $ / shares $ 11.01    
Initial conversion premium 22.50%    
Last reported sale price | $ / shares $ 8.99    
Purchase price as a percentage of principal amount 100.00%    
Circumstance one | Convertible Senior Notes due 2025      
Debt Instrument [Line Items]      
Threshold number of trading days during a period of 30 consecutive trading days   20  
Circumstance two | Convertible Senior Notes due 2025      
Debt Instrument [Line Items]      
Threshold number of consecutive trading days   30