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2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Impairment Losses (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Accounting Policies [Abstract] |  |
Impairment of bitcoin | $ 7,163 | $ 12,210
Impairment of goodwill | 0 | 12,048
Total impairment loss | $ 7,163 | $ 24,258

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