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Stock Based Compensation
6 Months Ended
Jun. 30, 2024
Stock Based Compensation  
Stock Based Compensation

Note 9 – Stock-Based Compensation

There have been no changes to our equity incentive plans, the ESPP, or our accounting methodology for stock-based compensation, as disclosed in our 2023 Form 10-K.

The fair value of stock options and RSUs issued to employees and directors is recognized as compensation expense over the period of service that generally coincides with the vesting period of the award. The Company allocated compensation ratably across Operating Expenses based on Company personnel costs incurred. When calculating the amount of annual compensation expense, the Company has elected not to estimate forfeitures and instead accounts for forfeitures as they occur.

For the three and six months ended June 30, 2024 and 2023, the Company recognized compensation costs totaling:

Three Months Ended June 30, 

Six Months Ended June 30, 

    

2024

    

2023

2024

    

2023

Stock-based compensation costs related to RSUs

$

1,397

$

954

$

2,609

$

1,589

Stock-based compensation costs related to stock options

 

1,612

 

1,889

 

3,226

 

3,476

Stock-based compensation costs related to the ESPP

42

80

79

80

Total stock-based compensation costs

$

3,051

$

2,923

$

5,914

$

5,145

The unrecognized future compensation costs as of June 30, 2024 and 2023, were $25,868 and $34,327, respectively.

The following table summarizes our award activity for RSUs and stock options for the three and six months ended June 30, 2024:

    

RSUs

Stock Options

Balance at December 31, 2023

4,473,016

 

24,264,016

Granted

3,159,872

4,566,167

Vested or Exercised

(264,754)

(2,360,316)

Forfeited

(72,619)

(842,395)

Balance at March 31, 2024

7,295,515

25,627,472

Granted

2,162,222

1,757,960

Vested or Exercised

(867,515)

(1,230,581)

Forfeited

(886,343)

(1,873,843)

Balance at June 30, 2024

7,703,879

24,281,008

Stock Options

The fair value of each stock option grant during the six months ended June 30, 2024 and 2023 was estimated on the grant date using the Black-Scholes option pricing model with the following weighted-average assumptions used:

    

Six Months Ended June 30, 

 

    

2024

 

2023

 

Approximate riskfree rate

 

4.23

%

4.17

%

Volatility

 

48.10

%

46.91

%

Average expected life (in years)

 

6

6

Dividend yield

 

%

%

Weightedaverage grant date fair value

$

1.59

$

2.8

Estimated fair value of total stock options granted

$

5,175

$

7,815