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Stock Based Compensation (Tables)
3 Months Ended
Mar. 31, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of Outstanding Stock Option Activity

The following table summarizes the outstanding stock option activity during the period indicated (shares in thousands):

 

 

 

 

 

 

Weighted average

 

 

 

Number
of shares 

 

 

Exercise price

 

 

Remaining contractual term (years)

 

Balance at December 31, 2020

 

 

1,760

 

 

$

10.07

 

 

 

 

Granted

 

 

431

 

 

 

23.35

 

 

 

 

Exercised

 

 

(144

)

 

 

11.45

 

 

 

 

Expired/Forfeited

 

 

(11

)

 

 

11.94

 

 

 

 

Balance at March 31, 2021

 

 

2,036

 

 

 

12.77

 

 

 

7.8

 

 

 

 

 

 

 

 

 

 

 

Vested and exercisable at March 31, 2021

 

 

1,028

 

 

 

9.35

 

 

 

6.8

 

Vested and expected to vest at March 31, 2021

 

 

2,036

 

 

 

12.77

 

 

 

7.8

 

Summary of Outstanding Restricted Stock Unit Activity

The following table summarizes the Company's Restricted Stock Unit (RSU) activity during the period indicated (shares in thousands):

 

 

 

Restricted stock units

 

 

Weighted average grant date fair value

 

Non-vested balance at December 31, 2020

 

 

202

 

 

$

10.51

 

Grants

 

 

158

 

 

 

24.23

 

Vested and released

 

 

(61

)

 

 

10.43

 

Non-vested balance at March 31, 2021

 

 

299

 

 

 

17.75

 

 

Schedule Of Stock Based Compensation Expenses The stock-based compensation is recorded in the consolidated statements of operations as follows (in thousands):

 

 

 

Three months ended March 31,

 

 

 

2021

 

 

2020

 

Cost of goods sold

 

$

1

 

 

$

 

Research and Development

 

 

204

 

 

 

152

 

Sales and marketing

 

 

215

 

 

 

90

 

General and administrative

 

 

508

 

 

 

426

 

Total stock-based compensation expense

 

$

928

 

 

$

668