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Stock-Based Compensation (Tables) | 3 Months Ended
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Apr. 03, 2021
Stock-Based Compensation |
Schedule of stock-based compensation costs recognized in the Condensed Consolidated Statements of Income | 9. Stock-Based Compensation (Continued) ​ The following table presents details of stock-based compensation costs recognized in the Condensed Consolidated Statements of Income (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | April 3, | ​ | April 4,
​ |  | 2021 |  | 2020
Cost of revenues | ​ | $ | 337 | ​ | $ | 335
Research and development | ​ | ​ | 7,024 | ​ |  | 7,370
Selling, general and administrative | ​ | ​ | 6,465 | ​ |  | 7,608
​ | ​ | ​ | 13,826 | ​ |  | 15,313
Income tax benefit | ​ | ​ | 1,665 | ​ |  | 1,366
​ | ​ | $ | 12,161 | ​ | $ | 13,947

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