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Note 9 - Stock-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2023
Notes Tables |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | October 1, |  |  | September 30, |  |  | October 1, |
(In thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Cost of revenue |  | $ | 1,035 |  |  | $ | 880 |  |  | $ | 3,402 |  |  | $ | 2,705 |
Research and development |  |  | 7,020 |  |  |  | 4,925 |  |  |  | 20,006 |  |  |  | 14,461 |
Selling, general, and administrative |  |  | 8,609 |  |  |  | 8,153 |  |  |  | 29,000 |  |  |  | 24,041 |
Total stock-based compensation |  | $ | 16,664 |  |  | $ | 13,958 |  |  | $ | 52,408 |  |  | $ | 41,207 |
Share-Based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block] |
(Shares in thousands) |  | Total |
Balance, December 31, 2022 |  |  | 985 |
Granted |  |  | 172 |
Effect of vesting multiplier |  |  | 331 |
Vested |  |  | (633 | )
Balance, September 30, 2023 |  |  | 855 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for outstanding performance shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Subparagraph (c) -Paragraph 2 -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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