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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2017
Stock-Based Compensation  
Schedule of weighted average assumptions applied to options

 

 

 

 

 

 

 

 

 

 

Nine Months Ended

 

 

 

September 30, 

 

 

    

2017

    

2016

 

Average risk free interest rate

 

 
1.7%

 

 
1.4%

 

Expected dividend yield

 

 

—

 

 

—

 

Expected lives (years)

 

 

4.0

 

 

4.2

 

Expected volatility

 

 
86.5%

 

 
92.8%

 

Weighted average grant date fair value (per share)

 

$

1.01

 

$

1.77

 

Weighted average exercise price (per share)

 

$

1.61

 

$

2.65