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Note 8 - Stock-based Compensation (Tables) | 6 Months Ended
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Jul. 02, 2023
Notes Tables |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | July 2, 2023 |  |  | July 3, 2022 |  |  | July 2, 2023 |  |  | July 3, 2022 |
Cost of revenue |  | $ | 88 |  |  | $ | 117 |  |  | $ | 166 |  |  | $ | 173 |
Research and development |  |  | 158 |  |  |  | 91 |  |  |  | 342 |  |  |  | 176 |
Selling, general and administrative |  |  | 340 |  |  |  | 269 |  |  |  | 793 |  |  |  | 511 |
Total |  | $ | 586 |  |  | $ | 477 |  |  | $ | 1,301 |  |  | $ | 860 |
Share-Based Payment Arrangement, Activity [Table Text Block] |
| Shares Available for Grants |
Balance at January 1, 2023 |  | 960 |
Authorized |  | — |
RSUs granted |  | (55 | )
RSUs forfeited or expired |  | 9 |
Options expired |  | 2 |
Balance at July 2, 2023 |  | 916 |
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 January 1, 2023 |  |  | 75 |  |  | $ | 24.50 |  |  |  | 2.80 |  |  | $ | — |
Forfeited or expired |  |  | (2 | ) |  | $ | 32.93 |  |  |  |  |  |  |  |  |
Balance outstanding, exercisable, and vested at July 2, 2023 |  |  | 73 |  |  | $ | 24.24 |  |  |  | 2.38 |  |  | $ | — |
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 January 1, 2023 |  | 630 |  | $ | 6.05
Granted |  | 55 |  |  | 6.11
Vested and released |  | (45 | ) |  | 5.80
Forfeited |  | (9 | ) |  | 7.25
Nonvested at July 2, 2023 |  | 631 |  | $ | 6.05

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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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -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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- 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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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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