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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Summary of Allocated Stock Based Compensation Expense

Stock-based compensation expense was allocated based on the employees’ and non-employees’ functions as follows:

 

 

Three Months Ended
June 30,

 

 

Six Months Ended
June 30,

 

 

 

2024

 

 

2023

 

 

2024

 

 

2023

 

Cost of revenue

 

$

33

 

 

$

51

 

 

$

78

 

 

$

98

 

Research and development

 

 

429

 

 

 

556

 

 

 

937

 

 

 

1,152

 

Sales and marketing

 

 

551

 

 

 

986

 

 

 

1,313

 

 

 

2,100

 

General and administrative

 

 

443

 

 

 

992

 

 

 

962

 

 

 

2,055

 

Total

 

$

1,456

 

 

$

2,585

 

 

$

3,290

 

 

$

5,405

 

Schedule of Weighted Average Assumptions Used in Black-Scholes Options Pricing Model

The weighted average assumptions used in the Black-Scholes options pricing model for the six months ended June 30, 2023 are as follows:

Expected dividend yield

 

0.0%

Risk free interest rate

 

3.9%

Expected stock price volatility

 

103.8%

Expected term (years)

 

6.1

Schedule of Fair Value of ESPP Used in Black-Scholes Options Pricing Model

The fair value of the purchase right for the ESPP option is estimated on the date of grant using the Black-Scholes pricing model with the following assumptions during 2024:

Expected dividend yield

 

0.0%

Risk free interest rate

 

5.2%

Expected stock price volatility

 

117.6%

Expected term (years)

 

0.5

Restricted Stock Units  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Summary of Restricted Stock Units, Restricted Stock Awards and Performance Stock Units

A summary of restricted stock unit activity for the six months ended June 30, 2024 is as follows:

 

 

 

 

 

Weighted

 

 

 

 

 

 

Average

 

 

 

 

 

 

Grant Date

 

 

 

Shares

 

 

Fair Value

 

Unvested at December 31, 2023

 

 

682,832

 

 

$

12.43

 

Granted

 

 

74,962

 

 

 

1.07

 

Vested

 

 

(59,876

)

 

 

58.26

 

Canceled

 

 

(1,816

)

 

 

35.27

 

Unvested at June 30, 2024

 

 

696,102

 

 

$

7.21

 

 

Performance Stock Units  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Summary of Restricted Stock Units, Restricted Stock Awards and Performance Stock Units

A summary of performance stock units activity for the six months ended June 30, 2024 is as follows:

 

 

 

 

 

Weighted

 

 

 

 

 

 

Average

 

 

 

 

 

 

Grant Date

 

 

 

Shares

 

 

Fair Value

 

Unvested at December 31, 2023

 

 

20,491

 

 

$

161.53

 

Vested

 

 

(573

)

 

 

15.84

 

Unvested at June 30, 2024

 

 

19,918

 

 

$

165.68