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Convertible Senior Notes - Narrative (Details) - Convertible Debt
 3 Months Ended 6 Months Ended 10 Months Ended 17 Months Ended
Feb. 05, 2021
USD ($)
tradingDay
shares
$ / shares
Mar. 31, 2023
USD ($)
shares
Mar. 31, 2023
USD ($)
shares
Mar. 31, 2022
shares
Jun. 30, 2022
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 $ 155,300,000          
Debt interest rate (as a percent) 0.75% 75.00% 75.00%          
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   $ 23,580,000 $ 23,580,000       $ 27,280,000  
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 | 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% 6.71%          
Remaining unamortized debt discount   $ 23,600,000 $ 23,600,000          
Remaining debt discount amortization period (in years)     2 years 9 months 18 days          
2026 Notes | Interest Rate Period One                
Debt Instrument [Line Items]                
Additional interest percentage           0.25%    
Interest rate threshold period           90 days    
2026 Notes | Interest Rate Period Two                
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      
Increase in additional paid-in-capital for sale or warrants $ 23,900,000              
Warrants exercised (in shares) | shares       0        
Warrants outstanding (in shares) | shares   0 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