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Significant Accounting Policies - Summary of Reclassifications Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Cash Flows from Operating Activities |  |
Net cash provided by operating activities | $ (2,692) | $ 2,290
Cash Flows from Investing Activities |  |
Net cash used in investing activities | (18,721) | (5,990)
Reclassification of purchases of securities owned, at fair value | 25,461 | 1,657
Reclassification of proceeds from the sale of securities owned, at fair value | $ 13,639 | 1,232
Reclassification Of Net Cash Flow From Securities Purchases And Sales [Member] |  |
Cash Flows from Operating Activities |  |
Reclassification of net cash flows from securities purchases and sales |  | 425
Cash Flows from Investing Activities |  |
Reclassification of purchases of securities owned, at fair value |  | (1,657)
Reclassification of proceeds from the sale of securities owned, at fair value |  | 1,232
Previously Reported [Member] |  |
Cash Flows from Operating Activities |  |
Net cash provided by operating activities |  | 1,865
Cash Flows from Investing Activities |  |
Net cash used in investing activities |  | (5,565)
As Corrected [Member] |  |
Cash Flows from Operating Activities |  |
Net cash provided by operating activities |  | 2,290
Cash Flows from Investing Activities |  |
Net cash used in investing activities |  | $ (5,990)

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