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2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Sep. 30, 2023
--- | --- | ---
Net Investment Income [Line Items] |  |
Bitcoin's Value | $ 43,035 |
Derivative investment asset | 1,454 | $ 2,697
Amount |  |
Net Investment Income [Line Items] |  |
Bitcoin's Value | 126,951 |
Derivative investment asset | 1,454 | 2,697
Investment in debt security | 755 | 726
Total | 129,160 | 3,423
Level 1 |  |
Net Investment Income [Line Items] |  |
Bitcoin's Value | 126,951 |
Derivative investment asset | 0 | 0
Investment in debt security | 0 | 0
Total | 126,951 | 0
Level 2 |  |
Net Investment Income [Line Items] |  |
Bitcoin's Value | 0 |
Derivative investment asset | 0 | 0
Investment in debt security | 0 | 0
Total | 0 | 0
Level 3 |  |
Net Investment Income [Line Items] |  |
Bitcoin's Value | 0 |
Derivative investment asset | 1,454 | 2,697
Investment in debt security | 755 | 726
Total | $ 2,209 | $ 3,423

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- Definition Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-1 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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