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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% |  |  |  |  |  |  |  |

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