Stock-Based Compensation - Stock-based compensation expense (Details) - USD ($) $ in Thousands |
3 Months Ended | |
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Mar. 31, 2021 |
Mar. 31, 2020 |
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| Share-based payment arrangements information | ||
| Total stock-based compensation expense | $ 2,538 | $ 802 |
| Unrecognized stock-based compensation expense | $ 24,200 | |
| Weighted-average period over which unrecognized stock-based compensation expense are expected to be recognized | 1 year 3 months 18 days | |
| Product development | ||
| Share-based payment arrangements information | ||
| Total stock-based compensation expense | $ 278 | 101 |
| Sales, marketing and customer support | ||
| Share-based payment arrangements information | ||
| Total stock-based compensation expense | 624 | 172 |
| General and administrative | ||
| Share-based payment arrangements information | ||
| Total stock-based compensation expense | $ 1,636 | $ 529 |
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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