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Summary of Significant Accounting Policies - Additional Information (Detail) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) Segment | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2020 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Number of operating segment | Segment |  |  | 1 |  |  |
Number of reportable segment | Segment |  |  | 1 |  |  |
Total assets | $ 482,986,000 |  | $ 482,986,000 |  | $ 589,705,000 |
Total liabilities | 132,936,000 |  | 132,936,000 |  | $ 109,519,000 |
Payment to acquire interest in joint venture |  |  | 1,715,000 | $ 3,920,000 |  |
Share of loss in operations of joint venture | $ 702,000 | $ 600,000 | 2,402,000 | 1,877,000 |  |
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 |  |  | 44.00% |  | 40.00% |
Customer Concentration Risk | Accounts Receivable [Member] | Related Party Client Two [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Percentage of net total revenue |  |  | 14.00% |  |  |
Customer Concentration Risk | Revenue Benchmark [Member] | Related Party Client One [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Percentage of net total revenue | 27.00% | 22.00% | 28.00% | 24.00% |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Total assets | $ 31,071,000 |  | $ 31,071,000 |  | $ 33,842,000 |
Total liabilities | 1,596,000 |  | 1,596,000 |  | 1,803,000 |
Total revenue | 14,447,000 | $ 16,339,000 | 47,469,000 | $ 52,814,000 |  |
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 | 3,920,000 |  |
Share of loss in operations of joint venture | 702,000 | $ 600,000 | (2,402,000) | $ (1,877,000) |  |
Equity method investment carrying value | $ 493,000 |  | $ 493,000 |  | $ 1,180,000 |
Maximum [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Percentage of economic or ownership interest in consolidated entities |  |  | 100.00% |  |  |

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