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Stock-Based Awards (Tables) | 6 Months Ended
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Jun. 27, 2026
Stock-Based Awards |
Schedule of common stock options activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Weighted-
​ | ​ | Number of | ​ | Average
​ | ​ | Shares | ​ | Exercise
​ | ​ | (in thousands) | ​ ​ ​ | Price
Outstanding as of December 27, 2025 | ​ | ​ | 2,699 | ​ | $ | 0.73
Granted | ​ | ​ | — | ​ | ​ | —
Exercised | ​ | ​ | (466) | ​ | ​ | 0.66
Expired or forfeited | ​ | ​ | (25) | ​ | ​ | 0.92
Outstanding as of June 27, 2026 | ​ | ​ | 2,208 | ​ | $ | 0.74
Schedule of restricted stock units | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Weighted-
​ | ​ | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Grant-Date
​ | ​ | Shares | ​ | Fair Value
​ | ​ | (in thousands) | ​ | per Share
Balance nonvested as of December 27, 2025 | ​ | ​ | 5,420 | ​ | $ | 1.26
Granted | ​ | ​ | 2,612 | ​ | ​ | 2.86
Vested | ​ | ​ | (1,052) | ​ | ​ | 2.57
Forfeited | ​ | ​ | (88) | ​ | ​ | 0.82
Balance nonvested as of June 27, 2026 | ​ | ​ | 6,892 | ​ | $ | 1.68
Schedule of stock-based compensation expense | ​ The following table summarizes the stock-based compensation expense by line item in the condensed consolidated statements of operations (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Three Months Ended | ​ ​ ​ | Six Months Ended
​ | ​ | ​ | June 27, | ​ | June 28, | ​ | June 27, | ​ | June 28,
​ | ​ | ​ | 2026 | ​ | 2025 | ​ | 2026 | ​ | 2025
Cost of sales | ​ | ​ | $ | 32 | ​ | $ | 42 | ​ | $ | 47 | ​ | $ | 50
Research and development | ​ | ​ | ​ | 106 | ​ | ​ | 137 | ​ | ​ | 281 | ​ | ​ | 345
Selling, general and administrative | ​ | ​ | ​ | 671 | ​ | ​ | 834 | ​ | ​ | 1,437 | ​ | ​ | 1,589
Total | ​ | ​ | $ | 809 | ​ | $ | 1,013 | ​ | $ | 1,765 | ​ | $ | 1,984

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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 the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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)(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 -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -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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