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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Summary of Stock Option Activity

The following is a summary of stock option activity for the year ended December 31, 2021:

 

  

 

Number

Outstanding

 

 

Average Exercise

Price per Share

 

 

Weighted Average

Remaining

Contractual Term

(Years)

 

 

Aggregate

Intrinsic

Value

 

Balance as of December 31, 2020

 

 

550,769

 

 

$

5.56

 

 

4.88

 

 

$

1,875,719

 

Granted

 

 

—

 

 

 

—

 

 

 

 

 

 

 

—

 

Cancelled or Expired

 

 

(6,142

)

 

 

21.46

 

 

 

 

 

 

 

—

 

Exercised

 

 

(29,934

)

 

 

10.00

 

 

 

 

 

 

 

—

 

Balance as of December 31, 2021

 

 

514,693

 

 

$

5.11

 

 

 

4.11

 

 

$

11,850,930

 

Vested or expected to vest as of December 31, 2021

 

 

514,693

 

 

$

5.11

 

 

 

4.11

 

 

$

11,850,930

 

Exercisable as of December 31, 2021

 

 

514,693

 

 

$

5.11

 

 

 

4.11

 

 

$

11,850,930

 
Summary Information about Stock Options Outstanding

The following table summarizes information about stock options outstanding as of December 31, 2021:

 

  

 

Stock Options Outstanding

 

 

Stock Options Exercisable

 

Range of Exercise Prices

 

Number

Outstanding

 

 

Weighted Average

Remaining

Contractual Life

(Years)

 

 

Weighted Average

Exercise

Price

 

 

Number

Exercisable

 

 

Weighted Average

Exercise

Price

 

$4.36 - $7.20

 

 

452,510

 

 

 

4.37

 

 

$

4.41

 

 

 

452,510

 

 

$

4.41

 

$7.50 - $11.25

 

 

61,317

 

 

 

2.23

 

 

 

10.19

 

 

 

61,317

 

 

 

10.19

 

$11.30 - $16.95

 

 

500

 

 

 

2.25

 

 

 

11.30

 

 

 

500

 

 

 

11.30

 

$19.70 - $29.55

 

 

366

 

 

 

0.36

 

 

 

19.70

 

 

 

366

 

 

 

19.70

 

$4.36 - $29.55

 

 

514,693

 

 

 

4.11

 

 

$

5.11

 

 

 

514,693

 

 

$

5.11

 
Summary of Stock Unit Activity

The following is a summary of RSU activity for the year ended December 31, 2021:

 

  

 

Number

Outstanding

 

 

Weighted Average

Fair Value

 

Unvested as of December 31, 2020

 

 

682,563

 

 

$

4.34

 

Granted

 

 

288,368

 

 

 

14.64

 

Vested

 

 

(395,242

)

 

 

5.76

 

Forfeited

 

 

(89,960

)

 

 

4.92

 

Unvested as of December 31, 2021

 

 

485,729

 

 

$

9.19

 

RSUs vested but not released

 

 

296,477

 

 

$

5.31

 
Stock-Based Compensation Expense Related to Stock Options, RSUs and PSUs

The following table summarizes stock-based compensation expense related to stock options, RSUs, and PSUs included in the consolidated statements of comprehensive income (loss) for the years ended December 31, 2021 and 2020 (in thousands):

 

 

 

Year Ended December 31,

 

 

 

2021

 

 

2020

 

Cost of revenue

 

$

183

 

 

$

160

 

Research and development

 

 

486

 

 

 

685

 

Selling and marketing

 

 

545

 

 

 

480

 

General and administrative

 

 

1,392

 

 

 

1,702

 

Total

 

$

2,606

 

 

$

3,027

 
Performance Stock Units  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Summary of Stock Unit Activity

The following is a summary of PSU activity for the year ended December 31, 2021:

 

 

 

Number

Outstanding

 

Unvested as of December 31, 2020

 

 

200,000

 

Granted

 

 

—

 

Vested

 

 

(23,500

)

Forfeited

 

 

(1,500

)

Unvested as of December 31, 2021

 

 

175,000