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NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration Of customer Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2023
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |
Revenue | $ 45,729 |  | $ 44,976 | $ 134,912 | $ 128,861 |  |
Accounts receivable, net | 40,207 |  | 41,609 | 40,207 | 41,609 | $ 31,682 | $ 32,132
Customer Concentration Risk | Sales Revenue Net |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |
Revenue | 6,100 |  | 6,700 | 22,600 | 22,600 |  |
Customer Concentration Risk | Accounts Receivable |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |
Accounts receivable, net | $ 5,700 |  | $ 10,800 | $ 5,700 | $ 10,800 |  |
Customer Concentration Risk | Customer One | Sales Revenue Net |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |
Total revenue, percentage | 13.00% |  | 15.00% | 17.00% | 18.00% |  |
Geographic Concentration Risk | Long-term Assets | International |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |
Total revenue, percentage |  | 78.00% |  | 79.00% |  |  |
Geographic Concentration Risk | Long-term Assets, Excluding Goodwill and Other Intangibles | International |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |
Total revenue, percentage |  | 19.00% |  | 15.00% |  |  |

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