STOCK BASED COMPENSATION - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock based compensation expenses | $ 9,951 | $ 1,895 | $ 16,167 | $ 4,228 |
| Research and development | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock based compensation expenses | 4,450 | 893 | 7,205 | 2,176 |
| General and administrative expenses | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock based compensation expenses | 3,138 | 616 | 5,332 | 1,070 |
| Sales and marketing expense | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock based compensation expenses | 1,732 | 294 | 2,653 | 715 |
| Cost of sales | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total stock based compensation expenses | $ 631 | $ 92 | $ 977 | $ 267 |
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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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