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LONG-TERM DEBT - Additional Information (Details)
 1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2026
USD ($)
Jan. 18, 2024
USD ($)
May 08, 2023
USD ($)
Feb. 18, 2020
USD ($)
Feb. 13, 2020
USD ($)
$ / shares
shares
Feb. 28, 2025
USD ($)
Dec. 31, 2023
USD ($)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
May 15, 2025
Sep. 30, 2020
USD ($)
May 09, 2019
USD ($)
Debt Instrument [Line Items]                            
Payments for note hedge transactions   $ 433,000     $ 28,676,000                  
Sale of note hedge warrants   987,000         $ 250,000              
Loss on sale of derivatives   245,000                        
Gain on repurchase of warrants   105,000                        
Debt issuance costs, gross $ 0             $ 0 $ 0 $ 0 $ 0      
Amortization of deferred debt issuance costs               $ 215,000 $ 250,000 $ 431,000 $ 530,000      
Warrants term                       90 days    
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]                            
Aggregate principal amount   26,223,000   $ 138,000,000                    
Stated interest rate (percent)       1.00%                    
Proceeds from convertible debt       $ 132,762,000                    
Debt aggregate repurchase amount   90,777,000                     $ 21,000,000  
Repayments of convertible debt   87,391,000       $ 26,223,000                
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 repurchase 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     $ 400,000,000                     $ 450,000
Optional addition to borrowing capacity     $ 100,000                      
Consolidation basis (as a percent)     1                      
Minimum consolidated interest coverage ratio 16.2   3.0         16.2   16.2        
Maximum total leverage ratio 1.2   5.0         1.2   1.2        
Commitment fee multiplier     $ 400,000                      
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 | 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%                      
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%