Stock-Based Compensation
2014 Stock Incentive Plan
In 2014, the Company’s Board of Directors and stockholders approved and adopted the 2014 Stock Option/Stock Issuance Plan (the “2014 Plan”), which was amended in March 2015, October 2016 and April 2017. Under the 2014 Plan, incentive stock options, nonstatutory stock options, restricted stock and restricted stock units may be granted to eligible employees, directors and consultants. The Company’s Board of Directors resolved not to make any further awards under the 2014 Plan following the completion of the Company’s IPO. The 2014 Plan will continue to govern all outstanding awards granted thereunder.
2017 Stock Incentive Plan
In April 2017, the Board and stockholders approved and adopted the 2017 Stock Incentive Plan (the “2017 Plan”), which became effective on May 11, 2017. Under the 2017 Plan, incentive stock options, nonstatutory stock options, stock appreciation rights, stock awards and restricted stock units may be granted to employees, non-employee directors, consultants and advisors. The Board resolved not to make any further awards under the 2017 Plan following the adoption of the Company’s 2023 Plan (as defined below) by the Company’s stockholders in June 2023. The 2017 Plan will continue to govern all outstanding awards granted thereunder.
2018 Performance-Based Stock Incentive Plan
In June 2018, the Company’s stockholders approved the Company’s 2018 Performance-Based Stock Incentive Plan (the “2018 Plan”), and approved grants under the 2018 Plan of nonstatutory stock options, having performance-based vesting conditions tied to the future achievement of stock price milestones by the Company (each, a “Performance Option”), to the Company’s Chief Executive Officer for 1,809,900 shares (the “CEO Award”) and to the Company’s President for 1,357,425 shares (the “President Award”). In May 2018, the CEO Award and the President Award had been approved by a special committee of the Board of Directors of the Company (the “Special Committee”), and the 2018 Plan had been approved by the Company’s Board of Directors, subject to stockholder approval.

The 2018 Plan allows the Company to grant Performance Options to its executive officers and other employees as an incentive for them to remain in service with the Company and to further align their interests with the interests of the Company’s stockholders. A total of 4,200,000 shares of the Company’s common stock have been authorized for issuance under the 2018 Plan. On March 30, 2023, the Board approved an Amended and Restated Inducement Grant Plan that increased the number of shares reserved for issuance thereunder by 425,000 shares, to an aggregate of 1,175,000 shares.
As of December 31, 2025, there were no shares of common stock available for future grant under the 2018 Plan.
Inducement Grant Plan
In October 2020, the Company’s Board of Directors (the “Board”) adopted the Company’s Inducement Grant Plan (the “Inducement Grant Plan”). Under the Inducement Grant Plan, nonstatutory stock options, stock appreciation rights, stock awards, restricted stock units and dividend equivalent rights may be granted as an inducement material for eligible persons to enter into employment with the Company in accordance with NASDAQ Marketplace Rule 5635(c)(4) and the related guidance under NASDAQ IM 5635-1, and any amendments or supplements thereto. The Company has initially reserved 750,000 shares of common stock for issuance under the Inducement Grant Plan. As of December 31, 2025, an aggregate of 447,178 shares of common stock were available for future grant under the Inducement Grant Plan.
2023 Equity Incentive Plan

The Company’s 2023 Equity Incentive Plan (as amended, the “2023 Plan”) was approved by our Board in March 2023 and by our stockholders in June 2023 at our annual meeting. The 2023 Plan became effective immediately following the close of business on June 8, 2023 (the “2023 Plan Effective Time”). Under the 2023 Plan, the Compensation Committee or our Board has authority to grant incentive stock options to our employees and employees of certain subsidiaries, and to grant nonstatutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, performance stock awards, performance cash awards, and other forms of stock awards to our employees, directors and consultants and the employees and consultants of our affiliates. In March 2025, our Board approved the Amended and Restated 2023 Equity Incentive Plan that increased the number of shares reserved for issuance thereunder by 2,500,000 shares. The Amended and Restated 2023 Equity Incentive Plan was approved by our stockholders in June 2025 at our annual meeting.
Under the 2023 Plan, the Company may grant up to 5,000,000 shares of our common stock plus the aggregate of (A) the number of shares of our common stock which were available for the grant of new awards under the 2014 Plan and 2017 Plan as of the 2023 Plan Effective Time, and (B) all Returning Shares (as defined below), if any, as they become available from time to time. “Returning Shares” means shares of our common stock subject to an outstanding award granted under the 2014 Plan or 2017 Plan and that, following the 2023 Plan Effective Time: (1) are not issued because such stock award or any portion thereof expires or otherwise terminates without all of the shares covered by such stock award having been issued; (2) are not issued because such stock award or any portion thereof is settled in cash; (3) are forfeited back to or repurchased by the Company because of the failure to meet a contingency or condition required for the vesting of such shares; (4) are withheld or reacquired to satisfy the exercise, strike or purchase price; or (5) are withheld or reacquired to satisfy a tax withholding obligation. The Board may suspend or terminate the 2023 Plan at any time. The aggregate maximum number of shares of our common stock that may be issued pursuant to the exercise of incentive stock options granted under the 2023 Plan is 2,000,000 shares. The authority to grant new incentive stock options under the 2023 Plan will terminate on March 30, 2033.
As of December 31, 2025, an aggregate of 3,758,603 shares of our common stock were available for future grant under the 2023 Plan.
Terms of Awards Under Stock Plans
The 2014 Plan, 2017 Plan, 2018 Plan, Inducement Grant Plan and 2023 Plan are collectively referred to herein as the “Stock Plans.” The Stock Plans are administered by the Compensation Committee of the Board of Directors, which determines the recipients and the terms of the awards granted (with the exception of the CEO Award and President Award, which were approved by the Special Committee). All stock options granted under the Stock Plans have exercise prices equal to or greater than the fair market value of the Company’s common stock on the grant date, and expire ten years after the grant date, subject to earlier expiration in the event of termination of the optionee’s continuous service with the Company as further described in each Stock Plan. The vesting of all awards granted under the Stock Plans is generally subject to the awardee’s continuous service with the Company, with certain exceptions, as further described in each Stock Plan.
The Company has granted to employees, non-employee directors and consultants awards of stock options, restricted stock and restricted stock units that are subject to time-based vesting conditions. The time-based stock options that have been granted to employees and consultants generally vest over a period of four years (with the exception of certain stock options granted to the Company’s Chief Executive Officer and President in 2017, which vested over a period of three years, and certain other limited exceptions). Restricted stock units that have been awarded to employees generally vest, in some cases, over periods of one to four years. The restricted stock units awarded to members of the Company’s Board of Directors under the automatic grant program provisions of the 2023 Plan generally vest over a period of one year.
The Company has also granted Performance Options under the 2018 Plan, the 2017 Plan and the Inducement Grant Plan. All such Performance Options become exercisable in three equal tranches based on the achievement of specific stock price milestones for the Company’s common stock. These stock price milestones were amended in August 2020 with respect to substantially all of the Performance Options outstanding at such time, as discussed below. For each tranche to become exercisable, the closing price per share of the Company’s common stock must meet or exceed the applicable stock price target for a period of 30 consecutive trading days. In the first quarter of 2021, the Company achieved all of the stock price milestones and, accordingly, substantially all of the then-outstanding Performance Options have vested in full.
In addition, in April 2024, the Company granted Performance Stock Units under the 2023 Plan to the Chief Executive Officer and the Chief Financial Officer. All such Performance Stock Units become eligible to vest upon the achievement of certain revenue and non-GAAP net income targets for 2024. The Company failed to achieve either of the financial targets for 2024 and, accordingly, all of the Performance Stock Units granted under the 2023 Plan in 2024 were forfeited.
Stock-Based Compensation
The Company recognizes stock-based compensation expense for awards granted under the Stock Plans ratably over the requisite service period. For awards subject to time-based vesting conditions, the service period is generally the vesting period. For Performance Options, a derived service period is estimated for each tranche under the Monte Carlo simulation model. The Company also recognizes stock-based compensation expense related to the Company’s ESPP ratably over each purchase interval.
The Company has also issued shares of common stock to consultants in exchange for services under separate agreements outside of the Stock Plans. These share-based payment transactions are measured based on the fair value of the common stock issued and are recognized in the period in which the services are rendered.
The fair values of time-based stock options granted under the Stock Plans and purchase rights under the ESPP are determined as of the grant date using the Black-Scholes-Merton option-pricing model. There were no options granted during the years ended December 31, 2025 and 2024.
The assumptions used in calculating the fair values of purchase rights granted under the ESPP during the years ended years ended December 31, 2025 and 2024 are set forth in the table below:
Year Ended December 31,Year Ended December 31,
20252024
Expected term (in years)0.5— 2.00.5— 2.0
Expected volatility101 %— 129 %106 %— 139 %
Risk-free interest rate3.87 %— 4.28 %4.60 %— 4.60 %
Stock Options
The following table summarizes the activities for all stock options under the Company’s stock-based compensation plans for the year ended December 31, 2025:
Number of Options OutstandingWeighted-Average Exercise PriceWeighted-Average Remaining Contractual TermAggregate Intrinsic Value(1)
Outstanding as of December 31, 2024(2)8,438 $12.93 3.16 years$152 
Granted— $— 
Exercised(3)(80)$3.53 
Forfeited or expired(4)(400)$11.78 
Outstanding as of December 31, 2025(2)7,958 $13.08 3.20 years$424 
Exercisable as of December 31, 2025(5)7,918 $13.11 3.18 years$412 
Vested and expected to vest as of December 31, 2025(6)7,958 $13.08 3.20 years$424 
(1)The intrinsic value is the amount by which the current market value of the underlying stock exceeds the exercise price of the stock awards.
(2)Includes 3,530 and 3,620 performance condition stock options as of December 31, 2025 and 2024, respectively.
(3)Includes 4 performance condition stock options.
(4)Includes 86 performance condition stock options.
(5)Includes 3,530 performance condition stock options.
(6)Includes 3,530 performance condition stock options.
There were no stock options granted during the years ended December 31, 2025 and 2024. The total intrinsic value of stock options exercised during the years ended December 31, 2025 and 2024 was $173 and $161, respectively.
As of December 31, 2025, the total unrecognized compensation cost related to all nonvested stock options was $1,026 and the related weighted-average period over which it is expected to be recognized was approximately 1.02 years.
Restricted Stock Units
The following table summarizes the activities for all RSUs under the Company’s stock-based compensation plans for the year ended December 31, 2025:
Number of SharesWeighted-Average Grant Date Fair Value Per Share
Outstanding as of December 31, 2024(1)1,902 $4.94 
Granted(2)1,758 $3.26 
Vested(772)$4.84 
Forfeited(3)(572)$4.97 
Outstanding as of December 31, 2025(1)2,316 $3.69 
(1)Includes 323 and 248 performance condition RSUs as of December 31, 2025 and 2024, respectively.
(2)Includes 323 performance condition RSUs.
(3)Includes 248 performance condition RSUs.
The total vesting date fair value of RSUs which vested during the years ended December 31, 2025 and 2024 was $2,193 and $3,071, respectively.
As of December 31, 2025, the total unrecognized compensation cost related to all nonvested RSUs was $4,433 and the related weighted-average period over which it is expected to be recognized was approximately 1.78 years.
Stock-Based Compensation Expense
The following table provides information about stock-based compensation expense by award type:
Year Ended
December 31,
2025
December 31,
2024
Stock options$1,475 $2,091 
Restricted stock units3,651 5,043 
Employee stock purchase plan1,560 993 
Total stock-based compensation expense$6,686 $8,127 
The following table provides information about stock-based compensation expense by financial statement line item:
Year Ended
December 31,
2025
December 31,
2024
Cost of revenue (exclusive of depreciation and amortization)$— $— 
Sales and marketing1,069 1,047 
Research and development1,170 1,480 
General and administrative4,447 5,600 
Total stock-based compensation expense$6,686 $8,127 
Stock-based compensation expense capitalized as part of internal-use software was $192 and $375 for the years ended December 31, 2025 and 2024, respectively.

Historical Timeline

Fiscal YearFiled
2025Apr 15, 2026Showing above
2024Apr 1, 2025
2023Apr 1, 2024
2022Mar 16, 2023
2021Mar 17, 2022

About Stock Compensation Disclosures

Stock-based compensation disclosures detail the equity awards granted to employees and executives — including stock options, restricted stock units (RSUs), and performance shares — along with the valuation methods and assumptions used to expense them. This section reveals the true cost of talent retention and the alignment between management incentives and shareholder interests.

Key signals: total unrecognized compensation expense and its expected recognition period signal future earnings headwinds from already-granted awards. For stock options, examine Black-Scholes assumptions — expected volatility, risk-free rate, and expected term — as understating any of these reduces reported compensation expense. Compare stock compensation expense as a percentage of revenue against peers to assess dilution cost. Watch vesting schedules for acceleration clauses tied to change-of-control events. Performance-based awards with undemanding targets may indicate weak governance. Add back stock compensation to operating cash flow to calculate a more conservative free cash flow figure.