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Cash and Cash Equivalents, and Investments - Strategic Investment (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Sep. 30, 2017
Schedule of Investments [Line Items] |  |  |
Gain on sale of strategic equity investment | $ (5,338) | $ 0 |
Proceeds from sale of strategic equity investment | 6,845 | 0 |
TAPD, Inc. |  |  |
Schedule of Investments [Line Items] |  |  |
Cost method investment |  | $ 2,000 |
Foreign Entity |  |  |
Schedule of Investments [Line Items] |  |  |
Cost method investment |  |  | $ 3,000
Consideration received on sale | 8,300 |  |
Gain on sale of strategic equity investment | (5,300) |  |
Proceeds from sale of strategic equity investment | $ 6,800 |  |

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