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v3.23.3

Fair value of financial instruments and investments - Marketable Securities (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2020 USD ($) $ / shares | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) fund | Sep. 30, 2022 USD ($) fund | Dec. 31, 2022 USD ($)
Equity Investments |  |  |  |  |  |
Purchase of marketable securities - equity investments |  |  |  | $ 26,378 | $ 22,787 |
Net unrealized gain (loss) on equity investments |  |  |  | 5,484 | (11,319) |
Redemption of marketable securities- equity investments |  |  |  | 12,078 | 104,431 |
ClearPoint Convertible note |  |  |  |  |  |
Purchase of convertible note |  |  |  |  | 40,429 |
Unrealized gain (loss) on convertible note |  |  |  | (4,594) | (2,392) |
ClearPoint Equity Investment |  |  |  |  |  |
Equity Investments |  |  |  |  |  |
Net unrealized gain (loss) on equity investments |  | $ (2,000) | $ (3,500) | (3,100) | (1,100) |
Loss on sale of equity investments |  | 0 |  | 800 |  |
ClearPoint Equity Investment | Quoted prices in active markets for identical assets (Level 1) |  |  |  |  |  |
Equity Investments |  |  |  |  |  |
Fair value of equity investment |  | 4,500 |  | 4,500 |  | $ 11,000
ClearPoint convertible debt |  |  |  |  |  |
ClearPoint Convertible note |  |  |  |  |  |
Purchase of convertible note | $ 10,000 |  |  |  |  |
Conversion price - convertible note | $ / shares | $ 6.00 |  |  |  |  |
Term of convertible note | 5 years |  |  |  |  |
Unrealized gain (loss) on convertible note |  | (3,100) | (4,400) | (4,600) | $ (2,400) |
ClearPoint convertible debt | Recurring basis | Significant other observable inputs (Level 2) | Deposits and Other Assets, Noncurrent |  |  |  |  |  |
ClearPoint Convertible note |  |  |  |  |  |
ClearPoint convertible debt security |  | 10,600 |  | $ 10,600 |  | $ 15,200
Mutual Funds |  |  |  |  |  |
Equity Investments |  |  |  |  |  |
Number of mutual funds denominated in a foreign currency | fund |  |  |  | 1 |  |
Number of mutual funds liquidated | fund |  |  |  |  | 1 |
Net unrealized gain (loss) on equity investments |  | 1,100 | 100 | $ 5,500 | $ (11,300) |
Redemption of marketable securities- equity investments |  | 7,800 | 100,800 | $ 12,100 | 104,400 |
Unrealized foreign currency gains (losses) on equity investments |  | $ (1,400) | $ (1,400) |  | $ (1,000) |

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