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Stockholders' Equity (Tables)
 6 Months Ended
Jun. 30, 2018
Summary of Restricted Stock Award Activity

A summary of restricted stock award activity during the six months ended June 30, 2018 is as follows:

 

           Weighted 
   Number of Shares   Average 
   Unvested   Vested   Price 
             
Restricted stock awards outstanding at December 31, 2017   6,979,596    5,537,556   $0.41 
Vested   (2,088,739)   2,088,739      
Forfeited   —    —      
Restricted stock awards outstanding at June 30, 2018   4,890,857    7,626,295   $0.72 
Schedule of Fair Value of Stock Options Granted

The fair value of stock options granted during the six months ended June 30, 2018 were calculated using the Black-Scholes option-pricing model utilizing the following assumptions:

 

Risk-free interest rate   2.60% to 2.77%
Expected dividend yield   0%
Expected volatility   108.59% to 113.87 %
Expected life   6 years  
Summary of Stock Option Activity

A summary of stock option activity, including options issued in the form of warrants, during the six months ended June 30, 2018 is as follows:

 

           Weighted 
           Average 
       Weighted   Remaining 
   Number   Average   Contractual 
   of   Exercise   Life 
   Shares   Price   (in Years) 
             
Stock options outstanding at December 31, 2017   2,176,637   $1.25      
Granted   2,021,250    1.74      
Exercised   (125,000)   0.17      
Forfeited   (189,884)   1.43      
Expired   —    —      
Stock options outstanding at June 30, 2018   3,883,003   $1.49    9.29 
                
Stock options exercisable at June 30, 2018   937,271   $1.25    8.78 
Schedule of Exercise Prices of Common Stock Options

The exercise prices of common stock options, including options issued in the form of warrants, outstanding and exercisable are as follows at June 30, 2018:

 

    Options   Options 
Exercise   Outstanding   Exercisable 
Price   (Shares)   (Shares) 
          
Under $1.01    25,000    25,000 
$1.01 to $1.25    1,766,753    717,354 
$1.26 to $1.50    125,000    1,949 
$1.51 to $1.75    665,000    105,000 
$1.76 to $2.00    1,055,000    87,968 
$2.01 to $2.25    205,000    — 
Over $2.25    41,250    — 
     3,883,003    937,271 
Schedule of Common Stock Financing Warrants Outstanding and Exercisable

The exercise prices of common stock financing warrants outstanding and exercisable are as follows at June 30, 2018:

 

    Financing   Financing 
    Warrants   Warrants 
Exercise   Outstanding   Exercisable 
Price   (Shares)   (Shares) 
          
$0.20    327,490    327,490 
$1.15    119,565    119,565 
$1.19    1,500,000    1,500,000 
$1.20    210,438    210,438 
$1.30    216,120    216,120 
$2.50    60,000    60,000 
     2,433,613    2,433,613 
Common Stock Warrant [Member]  
Summary of Warrant Activity

A summary of Channel Program common stock warrant activity during the six months ended June 30, 2018 is as follows:

 

           Weighted 
           Average 
       Weighted   Remaining 
   Number   Average   Contractual 
   of   Exercise   Life 
   Shares   Price   (in Years) 
             
Channel Program warrants outstanding at January 1, 2018   1,303,832   $1.48      
Issued   295,000    1.74      
Exercised   —    —      
Forfeited   (182,200)   1.33      
Expired   —    —      
Channel Program warrants outstanding at June 30, 2018   1,416,633   $1.49    4.11 
                
Channel Program warrants exercisable at June 30, 2018   252,125   $1.46    4.06 
Common Stock Financing Warrant [Member]  
Summary of Warrant Activity

A summary of common stock financing warrant activity during the six months ended June 30, 2018 is as follows:

 

           Weighted 
           Average 
       Weighted   Remaining 
   Number   Average   Contractual 
   of   Exercise   Life 
   Shares   Price   (in Years) 
             
Financing warrants outstanding at December 31, 2017   1,289,172   $0.29      
Issued   1,986,558    1.24      
Exercised   (842,117)   0.20      
Forfeited   —    —      
Expired   —    —      
Financing warrants outstanding at June 30, 2018   2,433,613   $1.10    4.70 
                
Financing warrants exercisable at June 30, 2018   2,433,613   $1.10    4.70