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Fair Value Measurements - Change in Our Investments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Investment balance at beginning of period | $ 20,386 | $ 17,354 | $ 13,902 | $ 14,286 | $ 17,354 | $ 14,286
Other comprehensive income (loss) | (5) | 237 | 207 | 121 | 232 | 328
Investment balance at end of period | 20,427 | 20,386 | 16,718 | 13,902 | 20,427 | 16,718
Unrealized Gain (Loss) on Investment |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Other comprehensive income (loss) | (5) | 237 | 207 | 121 |  |
Equity Securities |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Purchase of investments |  |  | 250 |  |  | 250
Unrealized gain (loss) | 131 |  | 2,236 |  | 3,125 | 2,052
Embedded Option |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Unrealized gain (loss) | (85) |  | 123 |  | (284) | (198)
Convertible Note |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Unrealized gain (loss) | (5) |  | 207 |  | 232 | 328
(Level 1) |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Investment balance at beginning of period | 13,148 | 10,154 | 7,963 | 8,147 | 10,154 | 8,147
Investment balance at end of period | 13,279 | 13,148 | 10,199 | 7,963 | 13,279 | 10,199
(Level 1) | Equity Securities |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Purchase of investments |  |  | 0 |  |  | 0
Unrealized gain (loss) | 131 |  | 2,236 |  | 3,125 | 2,052
(Level 1) | Embedded Option |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Unrealized gain (loss) | 0 |  | 0 |  | 0 | 0
(Level 1) | Convertible Note |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Unrealized gain (loss) | 0 |  | 0 |  | 0 | 0
(Level 3) |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Investment balance at beginning of period | 7,238 | 7,200 | 5,939 | 6,139 | 7,200 | 6,139
Investment balance at end of period | 7,148 | $ 7,238 | 6,519 | $ 5,939 | 7,148 | 6,519
(Level 3) | Equity Securities |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Purchase of investments |  |  | 250 |  |  | 250
Unrealized gain (loss) | 0 |  | 0 |  | 0 | 0
(Level 3) | Embedded Option |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Unrealized gain (loss) | $ (85) |  | 123 |  | $ (284) | (198)
(Level 3) | Convertible Note |  |  |  |  |  |
Investments in and Advances to Affiliates, at Fair Value [Roll Forward] |  |  |  |  |  |
Unrealized gain (loss) |  |  | $ 207 |  |  | $ 328

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