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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 30, 2024
Share-Based Payment Arrangement [Abstract] |
Stock-Based Compensation Expenses | The following table shows stock-based compensation expense included in the condensed consolidated statements of operations for the three months ended March 30, 2024 and April 1, 2023 (in thousands):
|  | Three Months Ended |
|  | March 30, 2024 |  |  | April 1, 2023 |
Cost of revenues |  | $ | 60 |  |  | $ | 61 |
Research and development |  |  | 52 |  |  |  | 52 |
Sales and marketing |  |  | 111 |  |  |  | 121 |
General and administrative |  |  | 171 |  |  |  | 239 |
Total stock-based compensation expense |  | $ | 394 |  |  | $ | 473 |
Summary of Stock Options | The following table summarizes stock options information during the three months ended March 30, 2024:
|  | Number of Shares |  |  | Weighted Average Exercise Price Per Share |  |  | Aggregate Intrinsic Value (thousands) |
Outstanding as of December 30, 2023 |  |  | 2,757,921 |  |  | $ | 3.60 |  |  |  |
Granted |  |  | 4,800 |  |  | $ | 2.78 |  |  |  |
Canceled or forfeited |  |  | (338,300 | ) |  | $ | 5.43 |  |  |  |
Outstanding as of March 30, 2024 |  |  | 2,424,421 |  |  | $ | 3.35 |  |  | $ | 1,288 |
Weighted Average Assumptions for Fair Value Estimate of Stock-Based Awards (Options) | The Company uses the Black-Scholes option-pricing model to estimate the fair value of stock-based awards (options) with the following weighted-average assumptions:
|  | Three Months Ended |
|  | March 30, 2024 |  |  | April 1, 2023 |
Average risk free interest rate |  |  | 4.20 | % |  |  | 3.83 | %
Expected life (in years) |  |  | 4.40 |  |  | 4.41 |
Dividend yield |  | — |  |  | — |
Average volatility |  |  | 79 | % |  |  | 76 | %
Summary of Stock Options Outstanding, Vested, Expected to Vest and Exercisable | Information regarding stock options outstanding, vested, expected to vest, and exercisable as of March 30, 2024 is summarized below:
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Value (thousands) |
Options outstanding |  |  | 2,424,421 |  |  | $ | 3.35 |  |  |  | 4.68 |  |  | $ | 1,288 |
Options vested and expected to vest |  |  | 2,424,421 |  |  | $ | 3.35 |  |  |  | 4.68 |  |  | $ | 1,288 |
Options exercisable |  |  | 1,248,633 |  |  | $ | 4.07 |  |  |  | 3.46 |  |  | $ | 435 |
Restricted Stock Units | RSUs activity for the three months ended March 30, 2024 was nil, with 353,212 RSUs outstanding as of March 30, 2024.

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- Definition Tabular disclosure of the significant assumptions 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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -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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