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LONG-TERM DEBT, NET - Additional Information (Details)
 1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2025
USD ($)
Feb. 15, 2025
USD ($)
Jan. 18, 2024
USD ($)
May 08, 2023
USD ($)
Feb. 18, 2020
USD ($)
Feb. 13, 2020
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Sep. 30, 2020
USD ($)
Debt Instrument [Line Items]                        
Proceeds from sale of exchangeable senior note hedges                   $ 0 $ 1,238,000  
Repayments of convertible debt                   0 87,840,000  
Payments for note hedge transactions     $ 433,000     $ 28,676,000            
Sale of note hedge warrants     987,000       $ 250,000          
Loss on sale of exchangeable senior note hedges     245,000             0 245,000  
Payments for repurchases of warrants                   0 552,000  
Gain on repurchase of warrants     105,000                  
Debt issuance costs $ 0             $ 0 $ 0 0 0  
Amortization of debt issuance costs               $ 250,000 $ 262,000 $ 530,000 $ 676,000  
Class A Common Stock                        
Debt Instrument [Line Items]                        
Warrants outstanding ( in 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            
1% Exchangeable Senior Notes due 2025 | Exchangeable Notes                        
Debt Instrument [Line Items]                        
Original principal amount     26,223,000   $ 138,000,000              
Stated interest rate (percent) 1.00%       1.00%     1.00%   1.00%    
Proceeds from sale of exchangeable senior note hedges         $ 132,762,000              
Debt aggregate repurchase amount     90,777,000                 $ 21,000,000
Repayments of convertible debt   $ 26,223,000 87,391,000                  
Debt interest, repurchase amount     386,000                  
Debt issuance costs written off               $ 926,000        
Gain on retirement of debt     $ 2,397,000                  
Interest expense, debt   $ 131,000                    
Payments for repurchases of warrants             $ 119,000          
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit                        
Debt Instrument [Line Items]                        
Commitment Fee                   0.15%    
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | One, Two, Three or Six-month SOFR                        
Debt Instrument [Line Items]                        
Basis spread on variable rate 2.00%                      
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | One, Two, Three or Six-month SOFR | Minimum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate       2.00%                
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | One, Two, Three or Six-month SOFR | Maximum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate       3.00%                
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | SOFR plus 1%                        
Debt Instrument [Line Items]                        
Basis spread on variable rate 1.00%                      
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | SOFR plus 1% | Minimum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate       1.00%                
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | SOFR plus 1% | Maximum                        
Debt Instrument [Line Items]                        
Basis spread on variable rate       2.00%                
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Revolving line of credit borrowing capacity       $ 450,000,000                
Optional addition to borrowing capacity       $ 100,000                
Consolidation basis       1                
Debt covenant, minimum consolidated interest coverage ratio 92.5     3.0       92.5   92.5    
Debt covenant, maximum total leverage ratio 0.1     5.0       0.1   0.1    
Commitment fee multiplier       $ 450,000                
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | Revolving Credit Facility | Minimum                        
Debt Instrument [Line Items]                        
Commitment Fee       0.15%                
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | Revolving Credit Facility | Maximum                        
Debt Instrument [Line Items]                        
Commitment Fee       0.30%                
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | Revolving Credit Facility | One, Two, Three or Six-month SOFR                        
Debt Instrument [Line Items]                        
Basis spread on variable rate       0.10%                
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | Revolving Credit Facility | Adjusted Term SOFR                        
Debt Instrument [Line Items]                        
Basis spread on variable rate       0.00%                
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | Revolving Credit Facility | Federal Funds Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate       0.50%                
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | Revolving Credit Facility | Secured Overnight Financing Rate (SOFR)                        
Debt Instrument [Line Items]                        
Basis spread on variable rate       1.00%                
Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility | Line of Credit | Revolving Credit Facility | Base Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate       1.00%