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STOCK-BASED COMPENSATION (Tables) | 3 Months Ended
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Mar. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Allocation of recognized period costs | The following table summarizes the allocation of stock-based compensation in the condensed consolidated statements of operations (in thousands):
| Three Months Ended March 31, |  |
| 2022 |  | 2023 |  |  |  |
Delivery costs | $ | 582 |  |  | $ | 568 |  |  |  |  |
Sales and marketing expense | 3,704 |  |  | 3,053 |  |  |  |  |
Research and development expense | 3,204 |  |  | 4,085 |  |  |  |  |
General and administration expense | 6,095 |  |  | 262 |  |  |  |  |
Total stock-based compensation expense | $ | 13,585 |  |  | $ | 7,968 |  |  |  |  |
Summary of RSU activity | We grant restricted stock units ("RSUs") to employees and our non-employee directors. The following table summarizes changes in RSUs, inclusive of performance-based RSUs:
| Shares (in thousands) |  | Weighted-Average Grant Date Fair Value |  | Weighted-Average Remaining Contractual Term (in years) |  | Unamortized Compensation Costs (in thousands)
Unvested — December 31, 2022 | 5,956 |  |  | $ | 25.43 |  |  |  |  |
Granted | 533 |  |  | 5.86 |  |  |  |  |
Vested | (179) |  |  | 48.30 |  |  |  |  |
Forfeited | (336) |  |  | 47.44 |  |  |  |  |
Unvested — March 31, 2023 | 5,974 |  |  | $ | 21.90 |  |  | 2.75 |  | $ | 95,767,329 |
Shares expected to vest - March 31, 2023 | 5,887 |  |  |  |  |  |  |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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