SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Feb 14, 2018 |    |
SC 13G/A | Amendment to a previously filed SC 13G | Feb 14, 2018 |    |
SC 13G/A | Amendment to a previously filed SC 13G | Feb 9, 2018 |     |
SC 13G/A | Amendment to a previously filed SC 13G | Feb 8, 2018 |    |