XML 58 R47.htm IDEA: XBRL DOCUMENT v3.20.2
Liabilities - Convertible Senior Notes - Carrying Amount (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
May 18, 2020
Dec. 31, 2019
Jan. 10, 2017
Debt        
Principal amount $ 381,695   $ 345,000  
Unamortized debt discount (56,377)   (40,820)  
Unamortized transaction costs (4,500)   (4,112)  
Net carrying value 320,818   300,068  
2023 Notes        
Debt        
Principal amount 256,695   345,000 $ 345,000
Unamortized debt discount (23,488)   (40,820)  
Unamortized transaction costs (2,366)   (4,112)  
Net carrying value 230,841   $ 300,068  
2027 Notes        
Debt        
Principal amount 125,000 $ 125,000    
Unamortized debt discount (32,889) $ (34,200)    
Unamortized transaction costs (2,134)      
Net carrying value $ 89,977