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Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands | 6 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2024 USD ($) Portfolio Segment | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) | Nov. 30, 2023 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Allowance for doubtful accounts as of December 31, 2022 | $ 131 |  | $ 132 |
Accumulated deficit | (228,730) |  | (233,026) |
Reserve balance for credit loss | 100 |  | 100 |
Deferred revenue | 300 |  | 500 |
Nonaccrual loans | 24,600 |  | $ 0 |
Notes receivable, principal amount | 35,200 |  |  |
Borrower's note balance | $ 23,100 |  |  |
Borrower's note balance, percentage | 66.00% |  | 62.00% |
Due from borrower | $ 23,100 |  |  |
Number of distinct portfolio purchases and loan agreements | Portfolio | 11 |  |  |
Amortization Cost |  |  |  | $ 51,600
Percentage of Amortization Cost |  |  |  | 59.00%
Weighted average of years to the life of the Restructured Loans |  |  |  | 1.50%
Allowances for Credit Losses | $ 1,100 | $ 1,000 |  |
Notes Receivables | 300 |  |  |
Equity method investments | 22,380 |  | $ 21,361 |
Other loans placed in nonaccrual status | 1,500 |  |  |
Beginning balance of reserve for credit losses as of January 1, 2023 | 100 |  | 100 |
Allowance for credit loss | (466) |  |  |
HGC Ltd.[Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Amortization Cost |  |  |  | $ 22,200
Percentage of Amortization Cost |  |  |  | 57.00%
Equity method investments | 800 |  |  |
Notes Receivable [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Notes Receivables | 5,700 |  |  |
Equity Method Investments [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Equity method investments | $ 18,900 |  |  |
Consolidated [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of reporting segment | Segment | 3 |  |  |
Accounting Standards Update 2022-02 [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Percentage of service revenue that is recognized over a period of time against total revenue | 1.3905% |  |  |
Note receivable outstanding | $ 500 |  | 700 |
Accounting Standards Update 2022-02 [Member] | Notes Receivable [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Percentage of service revenue that is recognized over a period of time against total revenue | 3.30% |  |  |
Accounting Standards Update 2022-02 [Member] | Equity Method Investments [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Percentage of service revenue that is recognized over a period of time against total revenue | 1.3905% |  |  |
Credit loss rate | 4.60% |  |  |
Allowance for credit loss | $ 1,000 |  | $ 900 |

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