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DEBT - Narrative (Details) |  |  | 3 Months Ended | 9 Months Ended |  |  |  |
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May 07, 2025 USD ($) | Feb. 05, 2021 USD ($) $ / shares | Feb. 05, 2021 USD ($) $ / shares | Feb. 05, 2021 USD ($) $ / shares | Feb. 05, 2021 USD ($) tradingDay $ / shares | Feb. 05, 2021 USD ($) businessDay $ / shares | Feb. 05, 2021 USD ($) shares $ / shares | Jun. 30, 2025 USD ($) shares | Jun. 30, 2025 USD ($) shares | Sep. 30, 2024 USD ($) | Feb. 13, 2024 USD ($) | Feb. 28, 2021 USD ($) | Feb. 02, 2021 $ / shares
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] |  |  |  |  |  |  |  | Convertible senior notes | Convertible senior notes |  |  |  |
Spanish Government Agencies | HooYu |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt interest rate (as a percent) |  |  |  |  |  |  |  | 0.00% | 0.00% |  |  |  |
Amount outstanding under loan agreement |  |  |  |  |  |  |  | $ 2,700,000 | $ 2,700,000 | $ 2,700,000 |  |  |
Spanish Government Agencies | HooYu | Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Current loans payable |  |  |  |  |  |  |  | 300,000 | 300,000 | 300,000 |  |  |
Spanish Government Agencies | HooYu | Other non-current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Noncurrent loans payable |  |  |  |  |  |  |  | $ 2,400,000 | $ 2,400,000 | 2,400,000 |  |  |
Spanish Government Agencies | Minimum | HooYu |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Term of loan agreement (in years) |  |  |  |  |  |  |  |  | 5 years |  |  |  |
Spanish Government Agencies | Maximum | HooYu |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Term of loan agreement (in years) |  |  |  |  |  |  |  |  | 12 years |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Unused revolving line facility fee (as a percent) | 0.25% |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs | $ 200,000 |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | 25,000,000.0 |  |  |  |  |  |  |  |  |  | $ 35,000,000 |  |
Additional value, line of credit facility, maximum borrowing capacity | 15,000,000 |  |  |  |  |  |  |  |  |  | $ 15,000,000 |  |
Commitment fees | 125,000 |  |  |  |  |  |  |  |  |  |  |  |
Indebtedness amount | 500,000 |  |  |  |  |  |  |  |  |  |  |  |
Maximum net leverage ratio |  |  |  |  |  |  |  | 2.50 | 2.50 |  |  |  |
Maximum net leverage ratio if engaged in a share purchase program |  |  |  |  |  |  |  | 2.75 | 2.75 |  |  |  |
Net leverage ratio |  |  |  |  |  |  |  | 1.20 | 1.20 |  |  |  |
Carrying amount |  |  |  |  |  |  |  | $ 0 | $ 0 |  |  |  |
Line of Credit | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued | $ 75,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Foreign Letter Of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Cash deposit, percentage | 115.00% |  |  |  |  |  |  |  |  |  |  |  |
Letter of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Cash deposit, percentage | 105.00% |  |  |  |  |  |  |  |  |  |  |  |
2026 Notes | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value |  |  |  |  |  |  |  | 151,500,000 | 151,500,000 |  |  |  |
2026 Notes | Convertible Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued |  |  |  |  |  |  |  | $ 155,300,000 | $ 155,300,000 |  |  | $ 155,300,000 |
Debt interest rate (as a percent) |  | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% |  |  |  |
Debt conversion ratio (per $1,000 principal amount) |  |  | 0.0479731000 |  |  |  |  |  |  |  |  |  |
Debt conversion price (in dollars per share) | $ / shares |  | $ 20.85 | $ 20.85 | $ 20.85 | $ 20.85 | $ 20.85 | $ 20.85 |  |  |  |  |  |
Conversion price premium percentage |  |  |  |  |  |  |  |  |  |  |  |  | 37.50%
Proceeds from debt offerings, net of discounts, commissions and expenses |  |  |  | $ 149,700,000 |  |  |  |  |  |  |  |  |
Debt issuance costs |  | $ 5,500,000 | $ 5,500,000 | $ 5,500,000 | $ 5,500,000 | $ 5,500,000 | $ 5,500,000 |  |  |  |  |  |
Remaining unamortized debt discount |  |  |  |  |  |  |  | $ 5,246,000 | $ 5,246,000 | 11,649,000 |  |  |
Carrying amount |  |  |  |  |  |  |  | $ 150,004,000 | $ 150,004,000 | $ 143,601,000 |  |  |
2026 Notes | Convertible Debt | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Share price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 15.16
2026 Notes | Convertible Debt | During any calendar quarter commencing after the calendar quarter ending on June 30, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt conversion price percentage |  | 130.00% | 130.00% | 130.00% | 130.00% | 130.00% | 130.00% |  |  |  |  |  |
Trading days in period (in days) | tradingDay |  |  |  |  | 20 |  |  |  |  |  |  |  |
Consecutive trading days in period (in days) | tradingDay |  |  |  |  | 30 |  |  |  |  |  |  |  |
2026 Notes | Convertible Debt | Measurement period |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt conversion price percentage |  | 98.00% | 98.00% | 98.00% | 98.00% | 98.00% | 98.00% |  |  |  |  |  |
Consecutive trading days in period (in days) |  |  |  |  | 5 | 5 |  |  |  |  |  |  |
2026 Notes | Convertible Debt | Embedded Derivative Financial Instruments |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Payment costs related to hedge transactions |  |  |  | $ 9,300,000 |  |  |  |  |  |  |  |  |
Embedded derivative, fair value of embedded derivative liability |  | $ 33,200,000 | $ 33,200,000 | 33,200,000 | $ 33,200,000 | $ 33,200,000 | $ 33,200,000 |  |  |  |  |  |
Value of remaining embedded derivative allocated to host contract |  | $ 116,500,000 | 116,500,000 | 116,500,000 | 116,500,000 | 116,500,000 | 116,500,000 |  |  |  |  |  |
Derivative interest rate |  |  |  |  |  |  |  | 6.71% | 6.71% |  |  |  |
Remaining unamortized debt discount |  |  |  |  |  |  |  | $ 5,200,000 | $ 5,200,000 |  |  |  |
Remaining debt discount amortization period (in years) |  |  |  |  |  |  |  |  | 7 months 6 days |  |  |  |
Additional Notes | Convertible Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Option period to purchase additional notes (in days) |  | 13 days |  |  |  |  |  |  |  |  |  |  |
Additional aggregate principal amount purchased |  | $ 20,300,000 | $ 20,300,000 | $ 20,300,000 | $ 20,300,000 | $ 20,300,000 | $ 20,300,000 |  |  |  |  |  |
Notes Hedge | Convertible Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt conversion price (in dollars per share) | $ / shares |  | $ 20.85 | $ 20.85 | $ 20.85 | $ 20.85 | $ 20.85 | $ 20.85 |  |  |  |  |  |
Conversion price premium percentage |  |  |  |  |  |  |  |  |  |  |  |  | 75.00%
Number of shares that can initially be converted into common stock (in shares) | shares |  |  |  |  |  |  | 7,400,000 |  |  |  |  |  |
Strike price of warrants (in dollar per share) | $ / shares |  | $ 26.53 | $ 26.53 | $ 26.53 | $ 26.53 | $ 26.53 | $ 26.53 |  |  |  |  |  |
Senior notes hedge balance |  | $ 33,200,000 | $ 33,200,000 | $ 33,200,000 | $ 33,200,000 | $ 33,200,000 | $ 33,200,000 |  |  |  |  |  |
Shares purchased under the notes hedge (in shares) | shares |  |  |  |  |  |  |  |  | 0 |  |  |  |
Increase in additional paid-in-capital for sale or warrants |  |  |  | $ 23,900,000 |  |  |  |  |  |  |  |  |
Warrants exercised (in shares) | shares |  |  |  |  |  |  |  |  | 0 |  |  |  |
Warrants outstanding (in shares) | shares |  |  |  |  |  |  |  | 0 | 0 |  |  |  |
Notes Hedge | Convertible Debt | Observation period |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Consecutive trading days in period (in days) | tradingDay |  |  |  |  | 80 |  |  |  |  |  |  |  |
Incremental dilution of earnings per share of warrants (in shares) | shares |  |  |  |  |  |  |  | 0 |  |  |  |  |

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- Definition Amount of increase in additional paid in capital (APIC) resulting from the issuance of warrants. Includes allocation of proceeds of debt securities issued with detachable stock purchase warrants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 25 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481284/470-20-25-2 + Details
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- Definition The number of warrants issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-5 + Details
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