Annual report pursuant to Section 13 and 15(d)

Stock Options - Weighted Average Assumptions Used in Estimating Fair Value of Stock Options (Details)

v3.6.0.2
Stock Options - Weighted Average Assumptions Used in Estimating Fair Value of Stock Options (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based compensation arrangement by share-based payment award, Fair value assumptions and methodology      
Expected dividend yield 0.00% 0.00% 0.00%
Expected volatility 41.82% 56.74% 64.40%
Expected term (years) 6 years 26 days 5 years 5 months 1 day 5 years 8 months 27 days
Risk-free interest rate 1.60% 1.70% 1.90%