Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation and Employee Benefits Plan - Fair Value of Stock Options (Details)

v3.3.1.900
Stock-Based Compensation and Employee Benefits Plan - Fair Value of Stock Options (Details) - Stock Option [Member] - $ / shares
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average grant date fair value per share $ 4.03 $ 3.24
Risk-free interest rate 1.70% 0.71%
Dividend yield 0.00% 0.00%
Expected life (in years) 4 years 6 months 21 days 4 years 9 months
Volatility 51.00% 56.00%