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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% |  |  |  |  |  |  |  |  |  |  |

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