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8. INTANGIBLE ASSETS - Amortization Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2028 | Sep. 30, 2027 | Sep. 30, 2026 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |  |  |  |  |
Amortization of intangible assets | $ 7 | $ 78 | $ 415 | $ 2,050 | $ 2,053 | $ 2,113 | $ 1,963
Future amortization of intangible assets |  |  |  |  |  | $ 4,603 |

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- Definition Future amortization of intangible assets. + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482686/350-30-45-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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- References No definition available. + Details
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