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Convertible Senior Notes - Narrative (Details) - Convertible Debt
 3 Months Ended
Feb. 05, 2021
USD ($)
tradingDay
shares
$ / shares
Dec. 31, 2022
USD ($)
shares
Jan. 13, 2023
Sep. 30, 2022
USD ($)
Feb. 02, 2021
$ / shares
2026 Notes          
Debt Instrument [Line Items]          
Debt issued $ 155,300,000 $ 155,300,000      
Debt interest rate 0.75% 0.75%      
Debt conversion ratio (per $1,000 principal amount) 0.0479731000        
Debt conversion price (in dollars per share) | $ / shares $ 20.85        
Conversion price premium percentage         37.50%
Proceeds from debt offerings, net of discounts, commissions and expenses $ 149,700,000        
Debt issuance costs 5,500,000        
Remaining unamortized debt discount   $ 25,436,000   $ 27,280,000  
2026 Notes | Embedded Derivative Financial Instruments          
Debt Instrument [Line Items]          
Payment costs related to hedge transactions 9,300,000        
Embedded conversion derivative 33,200,000        
Value of remaining embedded derivative allocated to host contract $ 116,500,000        
Derivative interest rate 6.71%        
Remaining unamortized debt discount   $ 25,400,000      
Remaining debt discount amortization period (in years)   3 years 1 month 6 days      
2026 Notes | Common Stock          
Debt Instrument [Line Items]          
Share price (in dollars per share) | $ / shares         $ 15.16
2026 Notes | During any calendar quarter commencing after the calendar quarter ending on June 30, 2021          
Debt Instrument [Line Items]          
Debt conversion price percentage 130.00%        
Trading days in period (in days) | tradingDay 20        
Consecutive trading days in period (in days) | tradingDay 30        
2026 Notes | Measurement period          
Debt Instrument [Line Items]          
Debt conversion price percentage 98.00%        
Consecutive trading days in period (in days) | tradingDay 5        
2026 Notes | Interest Rate Period One | Subsequent Event          
Debt Instrument [Line Items]          
Additional interest percentage     0.25%    
Interest rate threshold period     90 days    
2026 Notes | Interest Rate Period Two | Subsequent Event          
Debt Instrument [Line Items]          
Additional interest percentage     0.50%    
Interest rate threshold period     180 days    
Additional Notes          
Debt Instrument [Line Items]          
Option period to purchase additional notes (in days) 13 days        
Additional aggregate principal amount purchased $ 20,250,000        
Notes Hedge          
Debt Instrument [Line Items]          
Debt conversion price (in dollars per share) | $ / shares $ 20.85        
Conversion price premium percentage         75.00%
Number of shares that can initially be converted into common stock (in shares) | shares 7,400,000        
Strike price of warrants (in dollar per share) | $ / shares $ 26.53        
Senior notes hedge balance $ 33,200,000        
Shares purchased under the notes hedge (in shares) | shares   0      
Sale of convertible senior notes warrants $ 23,900,000        
Warrants outstanding (in shares) | shares   0      
Warrants exercised (in shares) | shares   0      
Notes Hedge | Observation period          
Debt Instrument [Line Items]          
Consecutive trading days in period (in days) | tradingDay 80        
Incremental dilution of earnings per share of warrants (in shares) | shares   0