Annual report pursuant to Section 13 and 15(d)

Stock-based compensation - Fair value assumptions (Details)

v3.7.0.1
Stock-based compensation - Fair value assumptions (Details) - Employee Stock Option
12 Months Ended
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected life (in years) 7 years 5 months 13 days
Risk-free interest rate 1.41%
Volatility 37.00%
Dividend yield 0.00%