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Investments (Tables) | 12 Months Ended
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Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Summary of Securities without Readily Determinable Fair Value | The following table summarizes the gross unrealized gains and losses and estimated fair values for the Company’s securities without a readily determinable fair value (in thousands). These equity securities are included within ‘Long-term investments’ in the Consolidated Balance Sheets.
| Cost |  | Impairment |  | Adjustments |  | Reported Amount
December 31, 2021 |  |  |  |  |  |  |
Equity securities | $ | 17,156 |  |  | $ | (16,677) |  |  | $ | (479) |  |  | $ | — |
Total | $ | 17,156 |  |  | $ | (16,677) |  |  | $ | (479) |  |  | $ | — |
December 31, 2020 |  |  |  |  |  |  |
Equity securities | $ | 50,384 |  |  | $ | (19,605) |  |  | $ | (479) |  |  | $ | 30,300 |
Total | $ | 50,384 |  |  | $ | (19,605) |  |  | $ | (479) |  |  | $ | 30,300 |
Unrealized Gain (Loss) on Investments | The following table summarizes the gross unrealized gains and losses and fair values for short-term investments accounted for at fair value under the fair value option, with the unrealized gains and losses reported within earnings on the Statement of Operations (in thousands):
| Initial Book Value |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
December 31, 2021 |  |  |  |  |  |  |
Investment in Consensus (equity securities) | $ | (69,290) |  |  | $ | 298,490 |  |  | $ | — |  |  | $ | 229,200 |
Total | $ | (69,290) |  |  | $ | 298,490 |  |  | $ | — |  |  | $ | 229,200 |
Summary of Available-for-sale Investments | The following table summarizes the gross unrealized gains and losses and fair values for investments classified as available-for-sale (in thousands):
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
December 31, 2020 |  |  |  |  |  |  |
Corporate debt securities | $ | 511 |  |  | $ | 152 |  |  | $ | — |  |  | $ | 663 |
Total | $ | 511 |  |  | $ | 152 |  |  | $ | — |  |  | $ | 663 |
Available-for-Sale Securities Classified by Contractual Maturity Date | The following table summarizes the Company’s corporate debt securities designated as available-for-sale, classified by the contractual maturity date of the security (in thousands):
| December 31, 2021 |  | December 31, 2020
Due within 1 year | $ | — |  |  | $ | 663 |
Due within more than 1 year but less than 5 years | — |  |  | — |
Due within more than 5 years but less than 10 years | — |  |  | — |
Due 10 years or after | — |  |  | — |
Total | $ | — |  |  | $ | 663 |
Fair Value of Available-for-sale Investments in Unrealized Loss Position | There were no investments in an unrealized loss position as of December 31, 2021 or December 31, 2020.
Carrying Amount for Equity Method Investment | The following table discloses the carrying amount for the Company’s equity method investment (in thousands). These equity securities are included within ‘Long-term investments’ in the Consolidated Balance Sheets.
| December 31, 2021 |  | December 31, 2020
Equity securities | $ | 122,593 |  |  | $ | 67,195 |
Maximum exposure to loss | $ | 122,593 |  |  | $ | 67,195 |

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