Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation (Tables)

v3.10.0.1
Stock Based Compensation (Tables)
6 Months Ended
Jun. 30, 2018
Share-based Compensation [Abstract]  
Schedule of stock-based compensation expense
The amount of stock-based compensation expense recognized for the three and six months ended June 30, 2018 and 2017 as follows: 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
 
2018

2017
 
2018

2017
Research and development
 
$
20,379

 
$
33,217

 
$
31,876


$
80,783

General and administrative
 
549,199

 
222,526

 
756,581


507,180

Sales and marketing
 
38,853

 

 
62,798



Total stock-based compensation
 
$
608,431

 
$
255,743

 
$
851,255


$
587,963

Summary of option activity
Activity for the market-based options was as follows for the six months ended June 30, 2018:

 
 
Options Outstanding
 
 
Number of shares
 
Weighted average exercise price
 
Weighted average remaining contractual term (in years)
 
Aggregate intrinsic value (1)
Balance at December 31, 2017
 

 
 
 
 
 
 
Granted
 
500,000

 
$
4.24

 
 
 
 
Exercised
 

 
 
 
 
 
 
Forfeited
 

 
 
 
 
 
 
Balance at June 30, 2018
 
500,000

 
$
4.24

 
9.74
 
$50,000
Exercisable at June 30, 2018
 

 
 
 
 
 
 
(1) The aggregate intrinsic value in the above table represents the total pre-tax amount that a participant would receive if the option had been exercised on the last day of the respective fiscal period. Options with a market value less than its exercise value are not included in the intrinsic value amount.
A summary of option activity for the six months ended June 30, 2018 is as follows:
 
 
Options Outstanding
 
 
Number of shares
 
Weighted average exercise price
 
Grant date fair value of options
 
Weighted average remaining contractual term (in years)
Balance at December 31, 2017
 
2,823,489

 
$
3.93

 


 
7.29
Granted
 
1,286,622

 
$
3.80

 
$
2,904,560

 

Exercised
 
(153,431
)
 
$
2.54

 
 
 
 
Forfeited
 
(352,106
)
 
$
2.07

 


 

Balance at June 30, 2018
 
3,604,574

 
$
4.12

 


 
7.97
Exercisable at June 30, 2018
 
1,784,750

 
$
4.88

 


 
6.59
Schedule of fair value assumptions for options
The following table shows the assumptions used to compute stock-based compensation expense for stock options granted to employees and members of the board of directors under the Black-Scholes valuation model, and the assumptions used to compute stock-based compensation expense market-based stock option grants under a Monte Carlo simulation, for six months ended June 30, 2018:
 
Service-based options
 
 
Expected dividend yield
 
—%
Expected volatility
 
55 - 65%
Expected life (in years)
 
5.0 - 6.25
Risk-free interest rate
 
2.53 - 2.93%
 
 
Market-based options
 
 
Expected dividend yield
 
—%
Expected volatility
 
60%
Expected life (in years)
 
10
Risk-free interest rate
 
2.84%
Nonvested Restricted Stock Shares Activity
The following table summarizes the Company's RSA grants for six months ended June 30, 2018:
    
 
 
Non-vested RSAs Outstanding
 
 
Number of shares
 
Weighted average grant date fair value
Non-vested RSAs at December 31, 2017
 

 
$

Granted
 
400,000

 
$
4.24

Vested
 

 
$

Forfeited
 

 
$

Non-vested RSAs at June 30, 2018
 
400,000