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Summary of Significant Accounting Policies - Additional Information (Detail) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) Segment | Sep. 30, 2024 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2020 USD ($) | Mar. 11, 2025 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Number of operating segment | Segment |  |  | 1 |  |  |  |
Number of reportable segment | Segment |  |  | 1 |  |  |  |
Total assets | $ 359,425,000 |  | $ 359,425,000 |  | $ 435,968,000 |  |
Total liabilities | 92,062,000 |  | 92,062,000 |  | $ 119,724,000 |  |
Payment to acquire interest in joint venture |  |  | 0 | $ 1,715,000 |  |  |
Share of loss in operations of joint venture | $ 0 | $ 702,000 | 1,500,000 | 2,402,000 |  |  |
Impairment of intangible assets |  |  | 0 | 0 |  |  |
Impairment charges |  |  | $ 0 | $ 0 |  |  |
Customer Concentration Risk | Accounts Receivable [Member] | Related Party Client One [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Percentage of net total revenue |  |  | 51.00% |  | 47.00% |  |
Customer Concentration Risk | Accounts Receivable [Member] | Related Party Client Two [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Percentage of net total revenue |  |  | 10.00% |  | 13.00% |  |
Customer Concentration Risk | Revenue Benchmark [Member] | Related Party Client One [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Percentage of net total revenue | 32.00% | 27.00% | 29.00% |  |  |  |
Customer Concentration Risk | Revenue Benchmark [Member] | Related Party Client Two [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Percentage of net total revenue | 21.00% |  | 24.00% | 28.00% |  |  |
Aingelz, Inc. [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Minority investment | $ 1,000,000 |  | $ 1,000,000 |  |  |  | $ 1,000,000
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Total assets | 15,238,000 |  | 15,238,000 |  | $ 34,050,000 |  |
Total liabilities | 209,000 |  | 209,000 |  | 2,053,000 |  |
Total revenue | 6,599,000 | $ 14,447,000 | 24,153,000 | $ 47,469,000 |  |  |
Variable Interest Entity, Primary Beneficiary [Member] | CCACV JV LLC [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Payment to acquire interest in joint venture |  |  |  |  |  | $ 2,940,000 |
Percentage of ownership interest in joint venture |  |  |  |  |  | 49.00% |
Estimated additional total capital contributions necessary |  |  |  |  |  | $ 11,800,000 |
Additional capital contribution related to portion of phase one capital commitment |  | 0 | 0 | 1,715,000 |  |  |
Share of loss in operations of joint venture | 0 | $ 702,000 | 1,500,000 | $ 2,402,000 |  |  |
Equity method investment carrying value | $ 0 |  | $ 0 |  | $ 1,500,000 |  |
Maximum [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Percentage of economic or ownership interest in consolidated entities |  |  | 100.00% |  |  |  |

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