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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2016
Stockholders' Equity  
Schedule of Assumptions Used in Black-Scholes Valuation Model and Weighted Average Assumptions

 

 

 

 

 

 

 

 

 

 

 

 

Year Ended December 31, 

 

     

2016

     

2015

     

2014

 

 

 

 

 

Dividend yield

 

 —

%

 

 —

%

 

 —

%

Risk-free interest rate

 

1.76

%

 

1.18

%

 

1.90

%

Expected volatility

 

57.54

%

 

53.40

%

 

58.20

%

Expected term (in years)

 

4.78

 

 

5.00

 

 

5.00

 

 

Warrants Outstanding

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Number

 

Weighted

 

 

 

 

 

 

 

of Shares

 

Average

 

 

 

 

 

 

 

Outstanding

 

Exercise

 

 

Average

 

 

 

 

Under

 

Price per

 

 

Contractual

 

 

 

   

Warrant

   

Share

   

 

Term

   

Warrants outstanding, December 31, 2014

 

 

3,617

 

$

3.09

 

 

 

 

Granted

 

 

1,100

 

 

4.44

 

 

 

 

Exercised

 

 

(450)

 

 

1.50

 

 

 

 

Warrants outstanding, December 31, 2015

 

 

4,267

 

$

3.61

 

 

5.50

 

Granted

 

 

 -

 

 

 -

 

 

 

 

Exercised

 

 

 -

 

 

 -

 

 

 

 

Warrants outstanding, December 31, 2016

 

 

4,267

 

$

3.61

 

 

4.78