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Employee Benefit Plans | 9 Months Ended
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Sep. 29, 2024
Employee Benefit and Share-Based Payment Arrangement, Noncash Expense [Abstract] |
Employee Benefit Plans | Note 10. Employe e Benefit Plans The Company grants options, RSUs and performance units under the 2016 Incentive Plan (the “2016 Plan”), under which awards may be granted to all employees. Vesting periods under this plan are generally four years for options and RSUs and three years for performance shares. As of September 29, 2024, approximately 2.3 million shares were reserved for future grants under the 2016 Plan. In February 2024, the Company’s Board of Directors approved 2024 Inducement Equity Incentive Plan (the “2024 Inducement Plan”), under which options, restricted stock awards, RSUs, stock appreciation rights, performance units, performance shares, and other stock or cash awards can be granted to personnel for positions of substantial responsibility. As of September 29, 2024, approximately 0.7 million shares were reserved for future grants under the 2024 Inducement Plan. Additionally, the Company sponsors an Employee Stock Purchase Plan (the “ESPP”). The terms of the plan include a look-back feature that enables employees to purchase stock semi-annually at a price equal to 85% of the lesser of the fair market value at the beginning of the offering period or the purchase date. The duration of each offering period is generally six months. As of September 29, 2024, approximately 0.5 million shares were available for issuance under the ESPP. Option Activity Stock option activity was as follows:
(In thousands, except per share amounts) |  | Number of Shares |  |  | Weighted Average Exercise Price Per Share |  |
Outstanding as of December 31, 2023 |  |  | 866 |  |  | $ | 30.70 |  |
Exercised |  |  | (17 | ) |  |  | 18.58 |  |
Expired |  |  | (209 | ) |  | $ | 30.26 |  |
Outstanding as of September 29, 2024 |  |  | 640 |  |  | $ | 31.16 |  |
Time-Based RSU Activity Time-based RSU activity was as follows:
(In thousands, except per share amounts) |  | Number of Shares |  |  | Weighted Average Grant Date Fair Value Per Share |
Outstanding as of December 31, 2023 |  |  | 1,567 |  |  | $ | 22.83 |
Granted |  |  | 1,493 |  |  | $ | 14.36 |
Vested |  |  | (728 | ) |  | $ | 23.07 |
Cancelled |  |  | (192 | ) |  | $ | 19.86 |
Outstanding as of September 29, 2024 |  |  | 2,140 |  |  | $ | 16.95 |
Performance-Based RSU Activity Since 2020, the Company’s executive officers have been granted performance-based restricted stock units (“PSUs”) under the 2016 Plan and 2024 Inducement Plan with vesting occurring at the end of an approximately three-year period if performance conditions or market conditions are met. The number of PSUs earned and eligible to vest are determined based on achievement of the pre-determined performance conditions or market conditions and the recipients’ continued service with the Company. The number of PSUs to vest could range from 0% to 150% of the target shares granted. For the PSUs with performance conditions, at the end of each reporting period, the Company evaluates the probability of achieving the performance conditions and records the related stock-based compensation expense based on performance to date over the service period. For the PSUs with market conditions, t he grant date fair value is determined using the Monte Carlo valuation method and the stock-based compensation expense is recognized straight line from the grant date to the vesting date. In February 2024, the Company granted PSUs under the 2024 Inducement Plan to its newly-hired Chief Executive Officer with 1/3 of the target PSUs allocated to each tranche and vesting occurring at the end of each anniversary of the vesting commencement date over a three-year period. The number of PSUs to vest could range from 0% to 150% of the target shares granted and are determined based on achievement of the pre-determined market conditions and the recipients’ continued service with the Company. T he grant date fair value was determined using the Monte Carlo valuation method. The stock-based compensation expense relating to PSUs with a market condition is recognized ratably from the service inception date to the vesting date for each tranche. PSU activity was as follows:
(In thousands, except per share amounts) |  | Number of Shares |  |  | Weighted Average Grant Date Fair Value Per Share |
Outstanding as of December 31, 2023 |  |  | 417 |  |  | $ | 24.76 |
Granted |  |  | 575 |  |  | $ | 20.25 |
Cancelled |  |  | (357 | ) |  | $ | 25.86 |
Outstanding as of September 29, 2024 |  |  | 635 |  |  | $ | 20.06 |
Valuation and Expense Information The following table sets forth the stock-based compensation expense resulting from stock options, RSUs (time-based and performance-based) and the ESPP included in the Company’s unaudited condensed consolidated statements of operations:
|  | Three Months Ended |  |  | Nine Months Ended |
(In thousands) |  | September 29, 2024 |  |  | October 1, 2023 |  |  | September 29, 2024 |  |  | October 1, 2023 |
Cost of revenue |  | $ | 444 |  |  | $ | 354 |  |  | $ | 1,222 |  |  | $ | 1,047 |
Research and development |  |  | 868 |  |  |  | 841 |  |  |  | 2,410 |  |  |  | 3,050 |
Sales and marketing |  |  | 1,520 |  |  |  | 1,271 |  |  |  | 3,992 |  |  |  | 4,099 |
General and administrative |  |  | 2,788 |  |  |  | 1,819 |  |  |  | 8,428 |  |  |  | 5,441 |
Total |  | $ | 5,620 |  |  | $ | 4,285 |  |  | $ | 16,052 |  |  | $ | 13,637 |
As of September 29, 2024, $38.8 million of unrecognized compensation cost related to unvested RSUs and performance shares expected to be recognized over a weighted-average period of 2.3 years.

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- Definition The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 710 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/710/tableOfContent Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 712 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/712/tableOfContent Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/715/tableOfContent Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/718/tableOfContent + Details
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