XML 32 R22.htm IDEA: XBRL DOCUMENT v3.20.2
Stockholders Equity (Tables)
9 Months Ended
Sep. 30, 2020
Weighted-Average Fair Value of Options Granted

Nine Months Ended September 30, 

    

2020

2019

Expected term

 

6.25 years

6.25 years

Expected volatility

 

84.40%

71.15%

Risk-free interest rate

 

1.41%

2.54%

Expected dividend yield

 

0%

0%

Stock-Based Compensation Expense

Three Months Ended September 30, 

Nine Months Ended September 30, 

    

2020

2019

   

2020

2019

    

Research and development expense

$

763,081

$

610,506

$

2,246,118

$

1,697,171

General and administrative expense

 

927,270

 

976,641

 

3,028,055

 

2,791,814

Total stock-based compensation expense

$

1,690,351

$

1,587,147

$

5,274,173

$

4,488,985

2003 Stock Incentive Plan  
Company's Stock Option Activity

A summary of the Company’s stock option activity under the 2003 Plan for the nine months ended September 30, 2020 is as follows:

 

WEIGHTED-

AGGREGATE

 

WEIGHTED-

AVERAGE

INTRINSIC

 

AVERAGE

REMAINING

VALUE

 

OUTSTANDING

EXERCISE

CONTRACTUAL

(IN

OPTIONS

    

PRICE

    

TERM (YEARS) 

    

THOUSANDS)

Outstanding as of December 31, 2019

382,337

$

1.33

 

1.3

Options exercised

(121,056)

 

1.12

Options forfeited

 

Outstanding, Vested and Exercisable as of September 30, 2020

261,281

 

1.43

 

0.7

$

428

2013 Equity Incentive Plan  
Company's Stock Option Activity

A summary of the Company’s stock option activity under the 2013 Plan for the nine months ended September 30, 2020 is as follows:

WEIGHTED-

AGGREGATE

 

WEIGHTED-

AVERAGE

INTRINSIC

 

AVERAGE

REMAINING

VALUE

 

OUTSTANDING

EXERCISE

CONTRACTUAL

(IN

 

OPTIONS

    

PRICE

    

TERM (YEARS) 

    

THOUSANDS)

Outstanding as of December 31, 2019

4,399,606

$

10.43

6.8

Options granted

1,473,100

4.49

Options exercised

Options forfeited

(68,089)

9.62

Outstanding as of September 30, 2020

5,804,617

8.93

6.9

$

10

Vested or expected to vest as of September 30, 2020

5,804,617

8.93

6.9

$

10

Exercisable as of September 30, 2020

3,456,330

9.79

5.5

$

Summary of RSU Activity

The following is a summary of RSU activity under the 2013 Plan for the nine months ended September 30, 2020:

 

 

 

Weighted-Average

 

Number of Shares

Grant Date

 

Underlying RSUs

    

Fair Value

 

Unvested at December 31, 2019

324,550

$

4.53

Granted

 

Forfeited

(12,382)

 

4.53

Vested

(104,100)

 

4.53

Unvested at September 30, 2020

208,068

 

4.53

Inducement Plan  
Company's Stock Option Activity

A summary of the Company’s stock option activity under the Inducement Plan for the nine months ended September 30, 2020 is as follows:

WEIGHTED-

AGGREGATE

 

WEIGHTED-

AVERAGE

INTRINSIC

 

AVERAGE

REMAINING

VALUE

 

OUTSTANDING

EXERCISE

CONTRACTUAL

(IN

 

OPTIONS

    

PRICE

    

TERM (YEARS) 

    

THOUSANDS)

Outstanding as of December 31, 2019

$

Options granted

100,600

3.09

Options exercised

Options forfeited

Outstanding as of September 30, 2020

100,600

3.09

9.7

$

41

Vested or expected to vest as of September 30, 2020

100,600

3.09

9.7

$

41

Exercisable as of September 30, 2020

$