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Long-Term Debt - Debt (Details)
3 Months Ended 6 Months Ended
Sep. 27, 2019
USD ($)
$ / shares
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Long-term debt      
Loss on extinguishment of debt     $ (2,145,000)
4.50% Convertible Senior Notes due 2026      
Long-term debt      
Aggregate principal amount $ 86,250,000    
Initial conversion rate 0.0654022    
Initial conversion price | $ / shares $ 15.29    
Redemption price in principal amount 100.00%    
Redemption price in principal amount, minimum percentage 25    
Proceeds, net $ 77,000,000    
Capped call transaction      
Long-term debt      
Initial conversion price | $ / shares $ 19.46    
Debt fees $ 7,100,000    
Term Loan A due 2020      
Long-term debt      
Loss on extinguishment of debt   $ (2,100,000)