v3.21.2

Cash, Cash Equivalents and Investments - Fair Values and Gross Unrealized Loss of Available-For-Sale Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | $ 45,951 | $ 111,565
Gross Unrealized Loss | (19) | (23)
Fair Value | 45,932 | 111,542
U.S. government securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 16,024 | 90,120
Gross Unrealized Loss | (10) | (14)
Fair Value | 16,014 | 90,106
Corporate bonds and commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 29,927 | 21,445
Gross Unrealized Loss | (9) | (9)
Fair Value | $ 29,918 | $ 21,436

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