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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of Stock Options Activity

The following is a summary of stock option activity during the three months ended March 31, 2022:

 

 

 

Options Outstanding

 

 

 

Number of

Options

 

 

Weighted-

Average

Exercise

Price

 

 

Weighted-

Average

Remaining

Contractual

Life (years)

 

 

Aggregate

Intrinsic

Value

 

Balance—January 1, 2022

 

 

522,905

 

 

$

9.25

 

 

 

6.77

 

 

$

25,971

 

Options granted

 

 

 

 

$

 

 

 

 

 

$

 

Options exercised

 

 

 

 

$

 

 

 

 

 

$

 

Options canceled

 

 

(2,492

)

 

$

9.72

 

 

 

 

 

$

 

Balance—March 31, 2022

 

 

520,413

 

 

$

9.25

 

 

 

4.70

 

 

$

25,971

 

Exercisable as of March 31, 2022

 

 

520,065

 

 

$

9.25

 

 

 

4.70

 

 

$

25,971

 

Vested and expected to vest as of March 31, 2022

 

 

520,413

 

 

$

9.25

 

 

 

4.70

 

 

$

25,971

 

Summary of Restricted Stock Award Activity

A summary of restricted stock award activity within the Company’s equity plans and changes for the three months ended March 31, 2022 is as follows:

 

Restricted Stock Awards

 

Shares

 

 

Weighted

Average Grant-

Date Fair Value

 

Nonvested at January 1, 2022

 

 

2,106,180

 

 

$

14.94

 

Granted

 

 

155,456

 

 

$

3.48

 

Vested

 

 

(519,246

)

 

$

9.17

 

Forfeited

 

 

(193,594

)

 

$

16.02

 

Nonvested at March 31, 2022

 

 

1,548,796

 

 

$

13.70

 

Summary of Total Stock-based Compensation Expense by Function The following table summarizes the total stock-based compensation expense by function, including expense related to consultants, for the three months ended March 31, 2021 and 2022:

 

 

 

Three Months Ended March 31,

 

 

 

2021

 

 

2022

 

 

 

(in thousands)

 

Sales and distribution expenses

 

$

955

 

 

$

347

 

Research and development expenses

 

 

883

 

 

 

274

 

General and administrative expenses

 

 

5,061

 

 

 

2,244

 

Total stock-based compensation expense

 

$

6,899

 

 

$

2,865