Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Stock Option Assumptions (Details)

v3.3.1.900
Stock-based Compensation - Stock Option Assumptions (Details)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected life (years) 6 years 22 days 6 years 6 years
Volatility 66.10% 65.00% 65.00%
Risk-free interest rate 1.70% 1.90% 1.20%
Expected dividend yield 0.00% 0.00% 0.00%