Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Debt - Narrative (Detail)

v3.21.1
Debt - Narrative (Detail)
3 Months Ended
Jan. 11, 2021
USD ($)
day
$ / shares
Rate
shares
May 04, 2020
USD ($)
day
$ / shares
Rate
Mar. 31, 2021
USD ($)
day
Rate
shares
Mar. 31, 2020
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2021
Mar. 31, 2021
$ / shares
Jan. 06, 2021
$ / shares
Jan. 01, 2021
USD ($)
Dec. 31, 2020
USD ($)
Apr. 29, 2020
$ / shares
Dec. 31, 2019
USD ($)
Line of Credit Facility [Line Items]                        
Issuance of common stock, net     $ 2,617,000 $ 3,465,000                
Dilutive effect of Convertible Notes (in shares) | shares     5,538,360                  
Ownership of convertible notes (as a percent)   25.00%                    
Proceeds from issuance of convertible debt, net of issuance costs     $ 334,410,000 0                
Convertible senior notes, net         $ 530,378,000         $ 168,120,000    
Deferred income tax liabilities, net         1,744,000         5,415,000    
Accumulated deficit       505,043,000 843,714,000         $ 694,294,000   $ 507,408,000
Debt instrument, weighted average interest rates           5.07%       4.91%    
Accumulated Deficit                        
Line of Credit Facility [Line Items]                        
Accumulated deficit       $ (18,335,000) (28,603,000)         $ (7,185,000)   $ (11,357,000)
Cumulative Effect, Period of Adoption, Adjustment                        
Line of Credit Facility [Line Items]                        
Convertible senior notes, net                 $ 27,200,000      
Deferred income tax liabilities, net                 (6,600,000)      
Accumulated deficit                   (22,575,000)    
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Deficit                        
Line of Credit Facility [Line Items]                        
Accumulated deficit                 $ 2,700,000 696,000    
0.25% Convertible Senior Notes due 2028 | Convertible Debt                        
Line of Credit Facility [Line Items]                        
Stated interest rate (as a percent) | Rate 0.25%   0.25%                  
Debt instrument, face amount $ 345,000,000                      
Discount on principal amount (as a percent) | Rate 97.00%                      
Discount on shares $ 10,600,000                      
Threshold trading days | day 20                      
Consecutive trading days | day 30                      
Conversion price on applicable trading day (as a percent) 130.00%                      
Convertible Notes, conversion ratio | Rate 1.51172%                      
Convertible Notes, conversion price (in dollars per share) | $ / shares $ 66.15           $ 48.23          
Dilutive effect of Convertible Notes (in shares) | shares     4,867,738                  
Redemption price of principal (as a percent) 100.00%                      
Ownership of convertible notes (as a percent) 25.00%                      
Interest expense, contractual coupon interest     $ 200,000                  
Interest expense, accretion of debt discount     400,000                  
Interest expense, amortization of debt issuance costs     $ 6,700                  
Effective interest rate on Convertible Notes (as a percent)     0.70%                  
0.25% Convertible Senior Notes due 2028 | Convertible Debt | Level 2                        
Line of Credit Facility [Line Items]                        
Estimated fair value of debt         301,700,000              
0.25% Convertible Senior Notes due 2028 | Convertible Debt | Debt Instrument, Redemption, Period One                        
Line of Credit Facility [Line Items]                        
Threshold trading days | day 20                      
Consecutive trading days | day 30                      
Conversion price on applicable trading day (as a percent) 130.00%                      
0.25% Convertible Senior Notes due 2028 | Convertible Debt | Debt Instrument, Redemption, Period Two                        
Line of Credit Facility [Line Items]                        
Threshold trading days | day 5                      
Consecutive trading days | day 5                      
Principal amount priced to investors (as a percent) | Rate 98.00%                      
1.25% Convertible Senior Notes due 2025 | Convertible Debt                        
Line of Credit Facility [Line Items]                        
Stated interest rate (as a percent)   1.25% 1.25%     1.25%            
Debt instrument, face amount   $ 201,300,000                    
Discount on principal amount (as a percent) | Rate   97.00%                    
Discount on shares   $ 6,900,000                    
Threshold trading days | day   20                    
Consecutive trading days | day   30                    
Conversion price on applicable trading day (as a percent)   130.00%                    
Convertible Notes, conversion ratio | Rate   2.75198%                    
Convertible Notes, conversion price (in dollars per share) | $ / shares   $ 36.34         $ 48.23          
Redemption price of principal (as a percent)   100.00%                    
Interest expense, contractual coupon interest     $ 600,000                  
Interest expense, accretion of debt discount     300,000                  
Interest expense, amortization of debt issuance costs     $ 40,000.00                  
Effective interest rate on Convertible Notes (as a percent)     1.96%                  
Convertible debt, if converted, value in excess of principal   $ 65,900,000                    
1.25% Convertible Senior Notes due 2025 | Convertible Debt | Level 2                        
Line of Credit Facility [Line Items]                        
Estimated fair value of debt         $ 339,200,000         $ 320,900,000    
1.25% Convertible Senior Notes due 2025 | Convertible Debt | Debt Instrument, Redemption, Period One                        
Line of Credit Facility [Line Items]                        
Threshold trading days | day   20 20                  
Consecutive trading days | day   30 30                  
Conversion price on applicable trading day (as a percent)   130.00% 130.00%                  
1.25% Convertible Senior Notes due 2025 | Convertible Debt | Debt Instrument, Redemption, Period Two                        
Line of Credit Facility [Line Items]                        
Threshold trading days | day   5                    
Consecutive trading days | day   5                    
Principal amount priced to investors (as a percent) | Rate   98.00%                    
Over-Allotment Option                        
Line of Credit Facility [Line Items]                        
Issuance of common stock, net $ 334,400,000 $ 194,500,000                    
Common Stock Offering                        
Line of Credit Facility [Line Items]                        
Offering price per share (in dollars per share) | $ / shares               $ 49.00     $ 28.50  
Capped Call Transactions                        
Line of Credit Facility [Line Items]                        
Proceeds from issuance of convertible debt, net of issuance costs $ 29,300,000                      
Capped Call Transactions, Number Of Underlying Shares | shares 5,200,000                      
Offering price per share (in dollars per share) | $ / shares $ 85.75                      
Premium on offering price (as a percent) 75.00%                      
Public offering price (in dollars per share) | $ / shares $ 49.00