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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2023
Stockholders' Equity Note [Abstract] |
Schedule of Compensation Cost | The cost that has been charged against income for stock-based compensation is set forth below (in thousands):
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, 2023 |  |  | July 1, 2022 |  |  | June 30, 2023 |  |  | July 1, 2022 |
Employee stock options |  | $ | 3,479 |  |  | $ | 2,457 |  |  | $ | 6,456 |  |  | $ | 4,784 |
Restricted stock |  |  | 79 |  |  |  | 442 |  |  |  | 146 |  |  |  | 551 |
Restricted stock units |  |  | 2,148 |  |  |  | 1,231 |  |  |  | 3,749 |  |  |  | 1,993 |
Performance stock units |  |  | 2,403 |  |  |  | 1,310 |  |  |  | 3,509 |  |  |  | 1,692 |
Nonemployee stock options |  |  | 314 |  |  |  | 314 |  |  |  | 628 |  |  |  | 628 |
Total stock-based compensation expense |  | $ | 8,423 |  |  | $ | 5,754 |  |  | $ | 14,488 |  |  | $ | 9,648 |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The Company recorded stock-based compensation costs in the following categories (in thousands):
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, 2023 |  |  | July 1, 2022 |  |  | June 30, 2023 |  |  | July 1, 2022 |
Cost of sales |  | $ | 223 |  |  | $ | 106 |  |  | $ | 372 |  |  | $ | 176 |
General and administrative |  |  | 3,695 |  |  |  | 2,806 |  |  |  | 7,058 |  |  |  | 4,587 |
Selling and marketing |  |  | 2,492 |  |  |  | 1,324 |  |  |  | 3,349 |  |  |  | 2,213 |
Research and development |  |  | 2,013 |  |  |  | 1,518 |  |  |  | 3,709 |  |  |  | 2,672 |
Total stock-based compensation expense, net |  |  | 8,423 |  |  |  | 5,754 |  |  |  | 14,488 |  |  |  | 9,648 |
Amounts capitalized as part of inventory |  |  | 528 |  |  |  | 652 |  |  |  | 897 |  |  |  | 1,018 |
Total stock-based compensation expense, gross |  | $ | 8,951 |  |  | $ | 6,406 |  |  | $ | 15,385 |  |  | $ | 10,666 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The risk-free rate is based on the U.S. Treasury yield curve corresponding to the expected term at the time of the grant.
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, 2023 |  |  | July 1, 2022 |  |  | June 30, 2023 |  |  | July 1, 2022 |
Expected dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 58 | % |  |  | 54 | % |  |  | 59 | % |  |  | 54 | %
Risk-free interest rate |  |  | 3.41 | % |  |  | 3.27 | % |  |  | 3.87 | % |  |  | 1.83 | %
Expected term (in years) |  |  | 4.87 |  |  |  | 5.10 |  |  |  | 5.02 |  |  |  | 5.10 |
Schedule of Share-based Compensation, Stock Options, Activity | A summary of stock option activity under the Plan for six months ended June 30, 2023 is presented below:
|  | Stock Options (in 000’s) |  |  | Minimum Exercise Price |  |  | Maximum Exercise Price |
Outstanding at December 30, 2022 |  |  | 2,469 |  |  |  |  |  |  |
Granted |  |  | 584 |  |  |  |  |  |  |
Exercised |  |  | (195 | ) |  |  |  |  |  |
Forfeited or expired |  |  | (31 | ) |  |  |  |  |  |
Outstanding at June 30, 2023 |  |  | 2,827 |  |  | $ | 5.54 |  |  | $ | 154.96 |
Exercisable at June 30, 2023 |  |  | 1,903 |  |  |  |  |  |  |
Schedule of Share-based Compensation, Restricted Stock, RSUs and PSUs Activity | A summary of restricted stock, RSUs and PSUs activity under the Plan for the six months ended June 30, 2023 is presented below (shares in thousands):
|  | Restricted Stock |  |  | RSUs |  |  | PSUs |
Unvested at December 30, 2022 |  |  | 4 |  |  |  | 192 |  |  |  | 118 |
Granted |  |  | 10 |  |  |  | 259 |  |  |  | 178 |
Vested |  |  | (4 | ) |  |  | (80 | ) |  |  | (36 | )
Forfeited or expired |  |  | — |  |  |  | (6 | ) |  |  | (11 | )
Unvested at June 30, 2023 |  |  | 10 |  |  |  | 365 |  |  |  | 249 |

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