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LONG-TERM DEBT, NET - Additional Information (Details)
 3 Months Ended
Dec. 31, 2022
USD ($)
Oct. 03, 2022
USD ($)
Feb. 18, 2020
USD ($)
Feb. 13, 2020
USD ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Sep. 30, 2022
USD ($)
Debt Instrument [Line Items]              
Amortization of deferred debt issuance costs         $ 361,000 $ 254,000  
Debt issuance costs, net $ 2,968,000       2,968,000   $ 2,554,000
Exchangeable notes, fair value 103,990,000       103,990,000    
Payments for note hedge transactions       $ 28,676,000      
Debt issuance costs incurred         265,000 0  
Class A Common Stock              
Debt Instrument [Line Items]              
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      
1% Exchangeable Senior Notes due 2025 | Exchangeable Notes              
Debt Instrument [Line Items]              
Original principal amount $ 117,000,000   $ 138,000,000   $ 117,000,000    
Stated interest rate (percent) 1.00%   1.00%   1.00%    
Proceeds from convertible debt     $ 132,762,000        
Amortization of deferred debt issuance costs         $ 227,000 $ 159,000  
Debt issuance costs, net $ 2,223,000       2,223,000    
1% Exchangeable Senior Notes due 2025 | Exchangeable Notes | Class A Common Stock              
Debt Instrument [Line Items]              
Exchangeable notes, exchange rate, shares per $1000     0.0244666        
2020 Senior Secured Credit Facility | Line of Credit              
Debt Instrument [Line Items]              
Revolving line of credit borrowing capacity   $ 375,000,000          
Optional addition to borrowing capacity   $ 50,000,000          
Unused commitment fee (percent) 0.30%            
Debt covenant, minimum consolidated interest coverage ratio   3.00          
Debt covenant, maximum total leverage ratio   5.00          
Debt covenant, increase to maximum consolidated senior secured leverage ratio during leverage increase period   0.25          
Debt covenant, maximum consolidated senior secured leverage ratio   3.25          
Remaining borrowing capacity $ 111,826,000       $ 111,826,000    
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 SOFR              
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 SOFR | 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 SOFR | 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 | 30-day SOFR | Minimum              
Debt Instrument [Line Items]              
Basis spread on variable rate (percent)   0.10%          
2020 Senior Secured Credit Facility | Line of Credit | SOFR plus 1%              
Debt Instrument [Line Items]              
Basis spread on variable rate (percent) 1.25% 1.00%          
2020 Senior Secured Credit Facility | Line of Credit | SOFR plus 1% | Minimum              
Debt Instrument [Line Items]              
Basis spread on variable rate (percent)   0.25%          
2020 Senior Secured Credit Facility | Line of Credit | SOFR 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%