v3.21.2

Summary of Significant Accounting Policies - Software Development Cost (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Capitalized software development costs |  |  |  |
Intangible Assets, Net [Line Items] |  |  |  |
Capitalized costs | $ 1,600,000 | $ 300,000 | $ 3,900,000 | $ 700,000
Amortization of capitalized software development costs | 200,000 | 0 | 200,000 | 0
Capitalized software development costs |  |  |  |
Intangible Assets, Net [Line Items] |  |  |  |
Capitalized costs | 0 | 0 | 0 | 0
Amortization of capitalized software development costs | $ 200,000 | $ 200,000 | $ 600,000 | $ 600,000

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