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Stock-based Compensation (Tables)
3 Months Ended
Mar. 31, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity

The activity for the Company’s 2009 Stock Option Plan, 2014 Plan, and 2015 Plan, for the three months ended March 31, 2021, is summarized as follows:

 

 

 

Number of

Shares

 

 

Weighted-

Average

Exercise

Price

 

 

Weighted-

Average

Remaining

Contractual

Life (in years)

 

 

Aggregate

Intrinsic

Value ($000)

 

Outstanding — December 31, 2020

 

 

830,343

 

 

$

21.52

 

 

 

7.71

 

 

$

96

 

Granted

 

 

545,450

 

 

$

7.57

 

 

 

 

 

 

 

 

 

Forfeited/Cancelled

 

 

(4,187

)

 

$

8.48

 

 

 

 

 

 

 

 

 

Outstanding — March 31, 2021

 

 

1,371,606

 

 

$

16.01

 

 

 

8.33

 

 

$

355

 

Exercisable — March 31, 2021

 

 

500,625

 

 

$

29.27

 

 

 

6.72

 

 

$

37

 

Vested or expected to vest — March 31, 2021

 

 

1,371,606

 

 

$

16.01

 

 

 

8.33

 

 

$

355

 

 

Schedule of Restricted Stock Units ("RSU") Activity

Restricted stock unit (“RSU”) activity under the 2014 Plan and 2015 Plan for the three months ended March 31, 2021, is summarized as follows:

 

 

 

Number of

Shares

 

 

Weighted

Average

Grant Date

Fair Value

Per Share

 

Non-vested at December 31, 2020

 

 

29,087

 

 

$

9.52

 

Granted

 

 

73,675

 

 

$

7.55

 

Vested

 

 

(5,788

)

 

$

10.68

 

Non-vested at March 31, 2021

 

 

96,974

 

 

$

7.95

 

Stock-Based Compensation Expense Related to Stock Options

Stock-based compensation expense related to stock options is included in the following line items in the accompanying unaudited condensed consolidated statements of operations (in thousands):

 

 

 

Three Months Ended March 31,

 

 

 

2021

 

 

2020

 

Research and development

 

$

126

 

 

$

136

 

Selling, general and administrative

 

 

272

 

 

 

274

 

Total

 

$

398

 

 

$

410