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Long-Term Debt, Net - Additional Information (Details)
 3 Months Ended 6 Months Ended
Dec. 31, 2021
USD ($)
$ / shares
Feb. 18, 2020
USD ($)
day
$ / shares
Feb. 13, 2020
USD ($)
$ / shares
shares
May 09, 2019
USD ($)
Dec. 31, 2021
USD ($)
$ / shares
Dec. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
Debt Instrument [Line Items]                
Debt issuance costs incurred         $ 0 $ 0    
Amortization of deferred debt issuance costs         254,000 235,000    
Debt issuance costs, net $ 3,346,000       3,346,000     $ 3,599,000
Exchangeable notes, fair value 107,684,000       107,684,000      
Payments for note hedge transactions   $ 28,676,000            
1.0% Exchangeable Senior Notes due 2025                
Debt Instrument [Line Items]                
Repayments of convertible debt             $ 17,414,000  
1.0% Exchangeable Senior Notes due 2025 | Exchangeable Notes                
Debt Instrument [Line Items]                
Original principal amount   $ 138,000,000            
Stated interest rate (percent)   1.00%            
Proceeds from convertible debt   $ 132,762,000            
Debt issuance costs incurred   5,238,000            
Debt issuance costs   $ 4,150,000            
Amortization of deferred debt issuance costs         159,000 $ 140,000    
Debt issuance costs, net $ 2,446,000       $ 2,446,000      
Debt aggregate repurchase amount             21,000,000  
Debt interest repurchase amount             24,000  
Loss on retirement of debt             2,297,000  
Debt issuance cost write offs             $ 592,000  
1.0% Exchangeable Senior Notes due 2025 | Exchangeable Notes | In Event of Fundamental Change                
Debt Instrument [Line Items]                
Repurchase price as percent of face value of notes (percent)   100.00%            
1.0% Exchangeable Senior Notes due 2025 | Exchangeable Notes | February 20, 2023 to 47th Scheduled Trading Day Immediately Preceding the Maturity Date                
Debt Instrument [Line Items]                
Repurchase price as percent of face value of notes (percent)   100.00%            
2020 Senior Secured Credit Facility | Line of Credit                
Debt Instrument [Line Items]                
Revolving line of credit borrowing capacity       $ 275,000,000        
Optional addition to borrowing capacity       50,000,000        
Unused commitment fee (percent) 0.30%              
Debt covenant, minimum consolidated interest coverage ratio 3       3      
Debt covenant, maximum total leverage ratio 5       5      
Debt covenant, increase to maximum consolidated senior secured leverage ratio during leverage increase period 0.25       0.25      
Debt covenant, maximum consolidated senior secured leverage ratio 3.25       3.25      
Remaining borrowing capacity $ 115,494,000       $ 115,494,000      
Debt covenant, equity repurchase limit from employees, directors, officers or consultants       $ 3,000,000        
Debt covenant, dividend or distribution limit as percent of net cash proceeds from additional common equity issuance (percent)       5.00%        
2020 Senior Secured Credit Facility | Line of Credit | Minimum                
Debt Instrument [Line Items]                
Unused commitment fee (percent)       0.15%        
2020 Senior Secured Credit Facility | Line of Credit | Maximum                
Debt Instrument [Line Items]                
Unused commitment fee (percent)       0.30%        
2020 Senior Secured Credit Facility | Line of Credit | One, Two, Three or Six-month LIBOR                
Debt Instrument [Line Items]                
Basis spread on variable rate (percent) 3.25%              
2020 Senior Secured Credit Facility | Line of Credit | One, Two, Three or Six-month LIBOR | Minimum                
Debt Instrument [Line Items]                
Basis spread on variable rate (percent)       2.25%        
2020 Senior Secured Credit Facility | Line of Credit | One, Two, Three or Six-month LIBOR | Maximum                
Debt Instrument [Line Items]                
Basis spread on variable rate (percent)       3.25%        
2020 Senior Secured Credit Facility | Line of Credit | Federal Funds Rate                
Debt Instrument [Line Items]                
Basis spread on variable rate (percent)       0.50%        
2020 Senior Secured Credit Facility | Line of Credit | LIBOR plus 1%                
Debt Instrument [Line Items]                
Basis spread on variable rate (percent) 1.25%     1.00%        
2020 Senior Secured Credit Facility | Line of Credit | LIBOR plus 1% | Minimum                
Debt Instrument [Line Items]                
Basis spread on variable rate (percent)       0.25%        
2020 Senior Secured Credit Facility | Line of Credit | LIBOR plus 1% | Maximum                
Debt Instrument [Line Items]                
Basis spread on variable rate (percent)       1.25%        
2020 Senior Secured Credit Facility | Line of Credit | Letter of Credit | Maximum                
Debt Instrument [Line Items]                
Unused commitment fee (percent)       3.25%        
Additional Paid-In Capital                
Debt Instrument [Line Items]                
Adjustments to additional paid in capital, equity component of convertible debt   $ 28,662,000            
Additional Paid-In Capital | 1.0% Exchangeable Senior Notes due 2025 | Exchangeable Notes                
Debt Instrument [Line Items]                
Debt issuance costs   $ 1,088,000            
Class A Common Stock                
Debt Instrument [Line Items]                
Exchangeable notes, exchange price per share (in USD per share) | $ / shares $ 40.87 $ 40.87     $ 40.87      
Warrants outstanding (shares) | shares     3,376,391          
Warrants sold in connection with the issuance of the Exchangeable notes (in USD per share) | $ / shares     $ 62.88          
Proceeds from issuance of warrants     $ 14,669,000          
Class A Common Stock | 1.0% Exchangeable Senior Notes due 2025 | Exchangeable Notes                
Debt Instrument [Line Items]                
Exchangeable notes, exchange rate, shares per $1000   0.0244666            
Class A Common Stock | 1.0% Exchangeable Senior Notes due 2025 | Exchangeable Notes | February 20, 2023 to 47th Scheduled Trading Day Immediately Preceding the Maturity Date                
Debt Instrument [Line Items]                
Threshold exchange price as percent of closing price per share to allow redemption (percent)   130.00%            
Threshold trading days closing price for stock must exceed exchange price | day   20