Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Tables)

v3.19.2
Stockholders' Equity (Tables)
 6 Months Ended
Jun. 30, 2019
Summary of stock option activity

The following table summarizes stock option activities for the six months ended June 30, 2019:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted Average

 

 

 

 

 

 

Remaining 

 

 

 

 

Weighted Average

 

Contractual Life

 

    

Stock Options

    

 Exercise Price

    

(in years)

Outstanding at December 31, 2018

 

1,241,675

 

$

5.73

 

8.31

Options granted

 

—

 

 

—

 

 —

Outstanding at June 30, 2019

 

1,241,675

 

 

5.73

 
7.81

Options vested and exercisable at June 30, 2019

 

310,417

 

$

5.73

 
7.81

 

Summary of Stock based compensation expenses

The following table summarizes stock-based compensation expense for the three and six months ended June 30, 2019 and 2018 (in thousands).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For the three months ended June 30, 

 

For the six months ended June 30, 

 

    

2019

    

2018

    

2019

    

2018

General and administrative

 

$

333

  

$

393

 

$

669

  

$

936

Research and development

 

 

289

 

 

578

 

 

385

 

 

2,030

Total stock-based compensation expense

 

$

622

  

$

971

 

$

1,054

  

$

2,966

 

Summary of warrant activities

A summary of warrant activities for six months ended June 30, 2019 is presented below:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted Average

 

 

 

 

 

 

 

Remaining

 

 

 

 

Weighted Average

 

Contractual Life

 

    

Warrants

    

Exercise Price

    

(in years)

Outstanding as of December 31, 2018

 

5,210,698

 

$

8.32

  

3.10

Granted

 

288,184

 

 

3.47

 

9.75

Exercised

 

(65,358)

 

 

—

 

 —

Outstanding as of June 30, 2019

 

5,433,524

 

$

8.16

  

2.92

 

Restricted Stock [Member]  
Summary of restricted stock activities

The following table summarizes restricted stock award activities for the six months ended June 30, 2019:

 

 

 

 

 

 

 

 

 

 

 

Weighted Average

 

 

Number

 

Grant Date

 

    

of Shares

    

Fair Value

Nonvested at December 31, 2018

 

502,636

 

$

5.76

Granted

 

50,000

 

 

3.80

Nonvested at June 30, 2019

 

552,636

 

$

5.58

 

Restricted Stock Units (RSUs)  
Summary of restricted stock activities

The following table summarizes restricted stock units activities for the six months ended June 30, 2019:

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted Average

 

 

Number

 

Grant Date

 

    

of Units

    

Fair Value

Nonvested at December 31, 2018

 

  

1,032,084

  

$

7.77

Granted

 

  

309,000

  

 

2.99

Forfeited

 

  

(296,750)

  

 

7.98

Vested

 

  

(76,000)

  

 

10.81

Nonvested at June 30, 2019

 

  

968,334

  

$

5.94