Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation

v3.22.1
Stock Based Compensation
3 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement [Abstract]  
Stock-Based Compensation Stock-Based Compensation
2016 Equity Incentive Plan

On April 5, 2016, the Company’s board of directors adopted the 2016 Equity Incentive Plan (the “2016 Plan”) as the successor to the 2015 Omnibus Plan (the “2015 Plan”). The 2016 Plan was approved by the Company’s stockholders and became effective on May 18, 2016 (the “2016 Plan Effective Date”). Upon the 2016 Plan Effective Date, the 2016 Plan reserved and authorized up to 600,000 additional shares of common stock for issuance, as well as 464,476 unallocated shares remaining available for grant of new awards under the 2015 Plan. An Amended and Restated 2016 Equity Incentive Plan (the “2016 Amended Plan”) was approved by the Company’s stockholders in May 2018, which increased the share reserve by an additional 1.4 million shares. A Second Amended and
Restated 2016 Equity Incentive Plan (the “2016 Second Amended Plan”) was approved by the Company’s stockholders in August 2019, which increased the share reserve by an additional 850,000 shares. A Third Amended and Restated Equity Incentive Plan (the “2016 Third Amended Plan”) was approved by the Company’s stockholders in June 2020 which increased the share reserve by an additional 2,014,400 shares. During the term of the 2016 Third Amended Plan, the share reserve will automatically increase on the first trading day in January of each calendar year ending on (and including) January 1, 2026, by an amount equal to 4% of the total number of outstanding shares of common stock of the Company on the last trading day in December of the prior calendar year. On January 1, 2022, pursuant to the terms of the 2016 Third Amended Plan an additional 4,511,768 shares were made available for issuance. As of March 31, 2022, there were 2,501,823 shares available for future issuance under the 2016 Third Amended Plan.

Option grants expire after ten years. Employee options typically vest over four years. Employees typically receive a new hire option grant, as well as an annual grant in the first or second quarter of each year. In addition, in the first quarter of 2022 employees were also granted options that vest on the first anniversary of the grant date. Options granted to directors typically vest either immediately or over a period of one or three years. Directors may elect to receive stock options in lieu of board compensation, which vest immediately. For stock options granted to employees and non-employee directors, the estimated grant date fair market value of the Company’s stock-based awards is amortized ratably over the individuals’ service periods, which is the period in which the awards vest. Stock-based compensation expense includes expense related to stock options, restricted stock units and employee stock purchase plan shares. The amount of stock-based compensation expense recognized for the three months ended March 31, 2022 and 2021 was as follows (in thousands): 
  Three Months Ended March 31,
  2022 2021
Research and development $ 287  $ 298 
General and administrative 4,184  1,045 
Sales and marketing 841  105 
Total stock-based compensation $ 5,312  $ 1,448 

As a result of separation agreements that the Company entered into in the first quarter of 2022 and in accordance with the terms of the pre-existing employment agreements, the Company accelerated the vesting of certain separated employees’ stock options and modified certain awards to extend the exercisability periods. The Company recognized $4.3 million of compensation cost for the three months ended March 31, 2022, of which, $3.5 million of expense was recognized in general and administrative expense and $0.8 million of expense was recognized and sales and marketing expense.

Stock options with service-based vesting conditions

The Company has granted awards that contain service-based vesting conditions. The compensation cost for these options is recognized on a straight-line basis over the vesting periods. A summary of option activity for the three months ended March 31, 2022 is as follows:
  Options Outstanding
  Number of shares Weighted average exercise price per share Weighted average grant date fair value per share Weighted average remaining contractual term (in years)
Balance at December 31, 2021 12,650,978  $ 3.69  $ 2.29  8.1
Granted 4,898,451  $ 0.79  $ 0.57 
Forfeited (1,445,139) $ 2.68  $ 1.83 
Expired (16,250) $ 2.40  $ 1.63 
Balance at March 31, 2022 16,088,040  $ 2.90  $ 1.80  7.0
Exercisable at March 31, 2022 8,333,750  $ 3.86  $ 2.32  4.8

In March 2022, the Company granted 3.3 million options with service-based vesting conditions to its employees as part of its annual stock option award that vest over four years. Additionally in March 2022, the Company granted 1.0 million options to its employees that vest on the first anniversary of the grant date. As a result of the reduction of workforce plan, 1.0 million options were forfeited during the period, and 0.4 million options were forfeited as a result of other terminations during the period.
The aggregate intrinsic value of stock options is calculated as the difference between the exercise price of the stock options and the fair value of the Company’s common stock for those stock options that had exercise prices lower than the fair value of the Company’s common stock. As of March 31, 2022, the aggregate intrinsic value of options outstanding was $0.1 million. There were 3,243,910 options that vested during the three months ended March 31, 2022 with a weighted average exercise price of $3.45 per share, which included the acceleration of vesting of certain options in accordance with the separation agreements entered in in the first quarter of 2022. The total grant date fair value of shares which vested during the three months ended March 31, 2022 was $7.2 million.

The Company recognized stock-based compensation expense of $5.3 million related to stock options with service-based vesting conditions for the three months ended March 31, 2022. At March 31, 2022, there was $10.9 million of total unrecognized compensation cost related to unvested service-based vesting condition awards. The unrecognized compensation cost is expected to be recognized over a weighted-average period of 2.2 years.

Stock-based compensation assumptions

The following table shows the assumptions used to compute stock-based compensation expense for stock options with service-based vesting conditions granted under the Black-Scholes valuation model for the three months ended March 31, 2022:
Service-based options  
Expected term of option (in years)  
5 - 6.25
Expected stock price volatility  
84.0% - 85.6%
Risk-free interest rate  
1.50% - 2.42%
Expected annual dividend yield   —%

Stock options with market-based vesting conditions

As of March 31, 2022 there were 1.0 million exercisable stock options that contained market-based vesting conditions (that had been previously satisfied). The options have a weighted average share price per share of $3.29 and a weighted average remaining contractual term of 2.2 years. There were no stock options with market-based vesting conditions granted, exercised, or forfeited for the three months ended March 31, 2022.

Restricted Stock Units

The Company measures the fair value of the restricted stock units using the stock price on the date of the grant. The restricted shares typically vest annually over a four-year period beginning on the first anniversary of the award. As of March 31, 2022, there were 11,250 unvested restricted stock units outstanding. The unvested restricted stock units have a weighted average grant date fair value of $4.50. There were no restricted stock units granted, vested, or forfeited for the three months ended March 31, 2022.

Employee Stock Purchase Plan

On April 5, 2016, the Company’s board of directors approved the 2016 Employee Stock Purchase Plan (the “ESPP”). The ESPP was approved by the Company’s stockholders and became effective on May 18, 2016 (the “ESPP Effective Date”).

Under the ESPP, eligible employees can purchase common stock through accumulated payroll deductions at such times as are established by the administrator. The ESPP is administered by the compensation committee of the Company’s board of directors. Under the ESPP, eligible employees may purchase stock at 85% of the lower of the fair market value of a share of the Company’s common stock (i) on the first day of an offering period or (ii) on the purchase date. Eligible employees may contribute up to 15% of their earnings during the offering period. The Company’s board of directors may establish a maximum number of shares of the Company’s common stock that may be purchased by any participant, or all participants in the aggregate, during each offering or offering period. Under the ESPP, a participant may not accrue rights to purchase more than $25,000 of the fair market value of the Company’s common stock for each calendar year in which such right is outstanding.

Upon the ESPP Effective Date, the Company reserved and authorized up to 500,000 shares of common stock for issuance under the ESPP. On January 1 of each calendar year, the aggregate number of shares that may be issued under the ESPP shall automatically increases by a number equal to the lesser of (i) 1% of the total number of shares of the Company’s capital stock outstanding on December 31 of the preceding calendar year, and (ii) 500,000 shares of the Company’s common stock, or (iii) a number of shares of
the Company’s common stock as determined by the Company’s board of directors or compensation committee. The number of shares were increased by 500,000 on January 1, 2022. As of March 31, 2022, 2,235,611 shares remained available for issuance.

In accordance with the guidance in ASC 718-50, Employee Share Purchase Plans, the ability to purchase shares of the Company’s common stock at the lower of the offering date price or the purchase date price represents an option and, therefore, the ESPP is a compensatory plan under this guidance. Accordingly, stock-based compensation expense is determined based on the option’s grant-date fair value and is recognized over the requisite service period of the option. The Company used the Black-Scholes valuation model and recognized stock-based compensation expense of $43.2 thousand for the three months ended March 31, 2022.