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Investments - Schedule of Strategic Investments Activity (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Schedule Of Available For Sale Securities [Line Items] |  |
Beginning balance | $ 7,332,000 |
Interest accrued | 105,000 |
Purchases of strategic investments | 3,959,000 | $ 4,300,000
Conversion of available-for-sale debt securities into equity securities | 3,680,000 |
Convertible note acquired in connection with abusiness combination |  | 3,000,000
Unrealized (losses) gains | (216,000) | 32,000
Impairment losses | (137,000) | 0
Ending balance | 11,043,000 | 7,332,000
Equity Securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Beginning balance | 3,882,000 |
Purchases of strategic investments |  | 3,850,000
Conversion of available-for-sale debt securities into equity securities | 3,680,000 |
Unrealized (losses) gains | (139,000) | 32,000
Impairment losses | (137,000) |
Ending balance | 7,286,000 | 3,882,000
Limited Partnerships |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Purchases of strategic investments | 3,609,000 |
Unrealized (losses) gains | (207,000) |
Ending balance | 3,402,000 |
Available-for-Sale Debt Securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Beginning balance | 3,450,000 |
Interest accrued | 105,000 |
Purchases of strategic investments | 350,000 | 450,000
Conversion of available-for-sale debt securities into equity securities | (3,680,000) |
Convertible note acquired in connection with abusiness combination |  | 3,000,000
Unrealized (losses) gains | 130,000 |
Ending balance | $ 355,000 | $ 3,450,000

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