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Cash, Concentration of Credit Risk and Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Concentration Risk [Line Items] |  |  |  |  |  |  |
Gain from observable price changes in orderly transactions of a long-term strategic investment | $ 1,600 |  | $ 1,000 | $ 1,900 |  |  |
Non-cash acquisition of patents |  | $ 30,100 |  |  | $ 30,100 | $ 0 |
Patents |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Patent impairment charges |  |  | $ 11,000 |  |  |  |
Accounts Receivable | Licensee Concentration Risk | Five Largest Licensees |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Accounts receivable percentage |  |  |  |  |  |  | 66.00%
Accounts Receivable | Licensee Concentration Risk | Three Largest Licenses |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Accounts receivable percentage |  |  |  |  | 84.00% |  |

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