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Stockholders' Equity and Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 30, 2023
Stockholders' Equity and Share-Based Compensation |
Schedule of Estimated fair value of Employee Stock Purchase Rights under the ESPP | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Fiscal Year Ended
​ | ​ | December 30, 2023 | ​ | December 31, 2022
Expected life | ​ | 0.5 years | ​ | 0.5 years
Risk-free interest rate | ​ | 4.76% - 5.47% | ​ | 0.19% - 2.52%
Expected volatility | ​ | 44.5% - 71.3% | ​ | 50.8% - 80.5%
Expected dividend yield | ​ | —% | ​ | —%
Summary of Stock Option Activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted |  | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | ​ | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ |  | Shares |  | Price |  | Term (in years) |  | Value(1)
Options outstanding, December 31, 2022 |  | 3,463 | ​ | $ | 2.25 |  |  |  | ​ |
Granted |  | — | ​ | $ | — |  |  |  | ​ |
Exercised |  | (1,673) | ​ | $ | 1.58 |  |  |  | ​ |
Cancelled: |  |  | ​ |  |  |  |  |  | ​ |
Forfeited |  | (68) | ​ | $ | 2.82 |  |  |  | ​ |
Expired |  | (29) | ​ | $ | 7.40 |  |  |  | ​ |
Options outstanding, December 30, 2023 |  | 1,693 | ​ | $ | 2.79 |  | 5.03 | ​ | $ | 1,642
Vested and expected to vest at December 30, 2023 |  | 1,693 | ​ | $ | 2.79 |  | 5.03 | ​ | $ | 1,642
Options exercisable, December 30, 2023 |  | 1,642 | ​ | $ | 2.71 |  | 4.98 | ​ | $ | 1,631
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted |  | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | ​ | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ |  | Shares |  | Price |  | Term (in years) |  | Value(1)
Options outstanding, January 1, 2022 |  | 4,765 | ​ | $ | 2.17 |  |  |  | ​ |
Granted |  | — | ​ | $ | — |  |  |  | ​ |
Exercised |  | (738) | ​ | $ | 1.74 |  |  |  | ​ |
Cancelled: |  |  | ​ |  |  |  |  |  | ​ |
Forfeited |  | (547) | ​ | $ | 2.16 |  |  |  | ​ |
Expired |  | (17) | ​ | $ | 4.45 |  |  |  | ​ |
Options outstanding, December 31, 2022 |  | 3,463 | ​ | $ | 2.25 |  | 4.79 | ​ | $ | 14,313
Vested and expected to vest at December 31, 2022 |  | 3,463 | ​ | $ | 2.25 |  | 4.79 | ​ | $ | 14,313
Options exercisable, December 31, 2022 |  | 2,903 | ​ | $ | 2.10 |  | 4.38 | ​ | $ | 12,333
(1) | These amounts represent the difference between the exercise price and the closing price of CarParts.com, Inc. common stock at the end of the respective fiscal year as reported on the NASDAQ Stock Market, for all options outstanding that have an exercise price currently below the closing price.

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