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Note 10 - Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 30, 2023
Notes Tables |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Year Ended |
|  | December 30, |  |  | December 31, |  |  | January 1, |
(In thousands) |  | 2023 |  |  | 2022 |  |  | 2022 |
Cost of revenue |  | $ | 4,506 |  |  | $ | 3,674 |  |  | $ | 3,049 |
Research and development |  |  | 27,782 |  |  |  | 19,645 |  |  |  | 14,563 |
Selling, general, and administrative |  |  | 37,909 |  |  |  | 32,211 |  |  |  | 28,863 |
Total stock-based compensation |  | $ | 70,197 |  |  | $ | 55,530 |  |  | $ | 46,475 |
Schedule of Share-based Payment Award, Stock Options and Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] |
|  | Year Ended
|  | December 30, |  | December 31, |  | January 1,
|  | 2023 |  | 2022 |  | 2022
Employee Stock Purchase Plan |  |  |  |  |  |
Weighted average expected volatility |  | 48.2% |  | 60.3% |  | 39.9%
Weighted average risk-free interest rate |  | 5.37% |  | 3.74% |  | 0.07%
Expected term (in months) |  | 6 |  | 6 |  | 6
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
(Shares and aggregate intrinsic value in thousands) |  | Shares |  |  | Weighted average exercise price |  |  | Weighted average remaining contractual term (years) |  |  | Aggregate Intrinsic Value |
Balance, December 31, 2022 |  |  | 918 |  |  | $ | 6.70 |  |  |  |  |  |  |  |  |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Exercised |  |  | (487 | ) |  |  | 6.66 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (3 | ) |  |  | 5.84 |  |  |  |  |  |  |  |  |
Balance, December 30, 2023 |  |  | 428 |  |  | $ | 6.75 |  |  |  |  |  |  |  |  |
Vested and expected to vest at December 30, 2023 |  |  | 428 |  |  | $ | 6.75 |  |  |  | 1.16 |  |  | $ | 26,626 |
Exercisable, December 30, 2023 |  |  | 428 |  |  | $ | 6.75 |  |  |  | 1.16 |  |  | $ | 26,626 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
(Shares in thousands) |  | Shares |  |  | Weighted average grant date fair value |
Balance, December 31, 2022 |  |  | 1,821 |  |  | $ | 50.18 |
Granted |  |  | 995 |  |  |  | 84.80 |
Vested |  |  | (880 | ) |  |  | 41.63 |
Forfeited or expired |  |  | (55 | ) |  |  | 56.69 |
Balance, December 30, 2023 |  |  | 1,881 |  |  | $ | 72.31 |
Schedule of Share-based Payment Award, Restricted Stock Units, Valuation Assumptions [Table Text Block] |
|  | Year Ended
|  | December 30, |  | December 31, |  | January 1,
|  | 2023 |  | 2022 |  | 2022
Executive RSUs with a market condition or performance condition |  |  |  |  |  |
Weighted average expected volatility |  | 50.97% to 54.31% |  | 51.44% |  | 50.37% to 52.11%
Weighted average risk-free interest rate |  | 4.28% to 4.59% |  | 1.67% |  | 0.22% to 0.77%
Expected term (years) |  | 3 |  | 3 |  | 3 to 5
Share-Based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block] |
(Shares in thousands) |  | Shares |  |  | Weighted average grant date fair value |
Balance, December 31, 2022 |  |  | 985 |  |  | $ | 60.15 |
Granted |  |  | 172 |  |  |  | 146.69 |
Effect of vesting multiplier |  |  | 334 |  |  |  |  |
Vested |  |  | (639 | ) |  |  | 40.22 |
Balance, December 30, 2023 |  |  | 852 |  |  | $ | 84.73 |

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- Definition Tabular disclosure of the significant assumptions of restricted stock units used during the year to estimate the fair value of restricted stock units, including, but not limited to: (a) expected term of restricted stock units and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
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- Definition Tabular disclosure of the significant assumptions of stock options and employee stock purchase plans used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
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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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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