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6. Investments at Fair Value (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Net realized and unrealized gain (loss) on investment | $ 13,661 | $ 669
Veritone Warrants [Member] |  |
Change in fair value of investment | 1,996 | (1,308)
Gain on sale of investment | 11,503 | 0
Veritone Common Stock [Member] |  |
Change in fair value of investment | 3,478 | 11,207
Loss on sale of investment | $ (3,316) | $ (9,230)

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