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Note 11 - Stock-based Compensation (Tables) | 9 Months Ended
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Sep. 28, 2025
Notes Tables |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 28, 2025 |  |  | September 29, 2024 |  |  | September 28, 2025 |  |  | September 29, 2024 |
Cost of revenue |  | $ | 231 |  |  | $ | 237 |  |  | $ | 578 |  |  | $ | 675 |
Research and development |  |  | 96 |  |  |  | 428 |  |  |  | 443 |  |  |  | 729 |
Selling, general and administrative |  |  | 501 |  |  |  | 645 |  |  |  | 1,586 |  |  |  | 2,131 |
Total |  | $ | 828 |  |  | $ | 1,310 |  |  | $ | 2,607 |  |  | $ | 3,535 |
Share-Based Payment Arrangement, Activity [Table Text Block] |
|  | Shares Available for Grants |
Balance at December 29, 2024 |  |  | 65 |
Authorized |  |  | 1,100 |
PSUs/RSUs granted |  |  | (618 | )
PSUs/RSUs forfeited or expired |  |  | 36 |
Balance at September 28, 2025 |  |  | 583 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  | Weighted |  |  | Weighted |  |  |  |  |
|  |  |  |  |  | Average |  |  | Average |  |  | Aggregate |
|  | Number of |  |  | Exercise |  |  | Remaining |  |  | Intrinsic |
|  | Shares |  |  | Price |  |  | Term |  |  | Value |
|  | (in thousands) |  |  |  |  |  |  | (in years) |  |  | (in thousands) |
Balance outstanding at December 29, 2024 |  |  | 48 |  |  | $ | 12.05 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | — |  |  | $ | — |  |  |  |  |  |  |  |  |
Balance outstanding, exercisable, and vested at September 28, 2025 |  |  | 48 |  |  | $ | 12.05 |  |  |  | 0.94 |  |  | $ | — |
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] |
|  | RSUs & PRSUs Outstanding |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  | Number of |  |  | Grant Date |
|  | Shares |  |  | Fair Value |
|  | (in thousands) |  |  |  |  |
Nonvested at December 29, 2024 |  |  | 599 |  |  | $ | 7.97 |
Granted |  |  | 618 |  |  |  | 5.01 |
Vested and released |  |  | (419 | ) |  |  | 7.64 |
Forfeited |  |  | (36 | ) |  |  | 8.65 |
Nonvested at September 28, 2025 |  |  | 762 |  |  | $ | 5.72 |

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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 of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -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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