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Stock-based Compensation (Tables)
6 Months Ended
Jun. 30, 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 six months ended June 30, 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

 

 

797,050

 

 

$

7.39

 

 

 

 

 

 

 

 

 

Forfeited/Cancelled

 

 

(20,313

)

 

$

6.72

 

 

 

 

 

 

 

 

 

Outstanding — June 30, 2021

 

 

1,607,080

 

 

$

14.70

 

 

 

8.37

 

 

$

175

 

Exercisable — June 30, 2021

 

 

576,904

 

 

$

26.62

 

 

 

6.79

 

 

$

18

 

Vested or expected to vest — June 30, 2021

 

 

1,607,080

 

 

$

14.70

 

 

 

8.37

 

 

$

175

 

 

Schedule of Restricted Stock Units ("RSU") Activity

Restricted stock unit (“RSU”) activity under the 2014 Plan and 2015 Plan for the six months ended June 30, 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

 

 

113,675

 

 

$

7.94

 

Vested

 

 

(5,788

)

 

$

10.68

 

Forfeited

 

 

(2,200

)

 

$

7.47

 

Non-vested at June 30, 2021

 

 

134,774

 

 

$

8.17

 

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 June 30,

 

 

Six Months Ended June 30,

 

 

 

2021

 

 

2020

 

 

2021

 

 

2020

 

Research and development

 

$

136

 

 

$

128

 

 

$

262

 

 

$

264

 

Selling, general and administrative

 

 

406

 

 

 

283

 

 

 

678

 

 

 

557

 

Total

 

$

542

 

 

$

411

 

 

$

940

 

 

$

821