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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2014
Stock-Based Compensation (Valuation Assumption) [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

 

 

 

 

 

 

Year Ended December 31

 

2014 

 

2013 

Dividend yield

0.00% 

 

0.00% 

Expected volatility

44.11% 

 

44.27-45.00%

Risk free interest rate

2.02% 

 

1.33-1.92%

Expected life

6 Years

 

5.5-6 Years