| Three Months Ended January 31, | Twelve Months Ended January 31, | ||||||||||||||
| 2022 | 2021 | 2022 | 2021 | ||||||||||||
| (unaudited, in thousands) | |||||||||||||||
| Stock-based compensation: | |||||||||||||||
| Cost of revenue | $ | 416 | $ | 347 | $ | 1,489 | $ | 1,328 | |||||||
| Research and development | 18,343 | 11,501 | 54,787 | 42,903 | |||||||||||
| Selling, general and administrative | 8,775 | 6,879 | 31,525 | 25,903 | |||||||||||
| Total stock-based compensation | $ | 27,534 | $ | 18,727 | $ | 87,801 | $ | 70,134 | |||||||
Ambarella, Inc. Announces Fourth Quarter and Fiscal Year 2022 Financial Results
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The following tables present details of stock-based compensation and acquisition-related costs included in each functional line item in the consolidated statements of operations above:
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