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Strategic Investments (Details) - USD ($) $ in Thousands | 9 Months Ended | 19 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021
Equity Securities without Readily Determinable Fair Value [Line Items] |  |
Balance, beginning of period | $ 11,711 |
Investments | 20,500 | $ 30,156
Observable price changes | 40,855 | 42,910
Sales | (14,546) | (14,546)
Balance, end of period | 58,520 | 58,520
Realized gain on sale of investment | 12,300 |
Strategic investments |  |
Equity Securities without Readily Determinable Fair Value [Line Items] |  |
Balance, beginning of period | 9,500 |
Investments | 20,500 | 27,568
Observable price changes | 40,321 | 42,753
Sales | (14,546) | (14,546)
Balance, end of period | 55,775 | 55,775
Warrants for strategic investment |  |
Equity Securities without Readily Determinable Fair Value [Line Items] |  |
Balance, beginning of period | 2,211 |
Investments |  | 2,588
Observable price changes | 534 | 157
Balance, end of period | $ 2,745 | $ 2,745

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