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Debt (Tables)
 9 Months Ended
Sep. 30, 2020
Debt Disclosure [Abstract]  
Convertible Debt The table below summarizes the components of interest expense related to the Convertible Notes.
Three Months Ended
September 30, 2020		Nine Months Ended
September 30, 2020
(Thousands)
Contractual interest expense$2,188 $3,695 
Amortization of debt discount4,767 7,998 
Amortization of issuance costs315 524 
Total Convertible Notes interest expense$7,270 $12,217