8-A12B/A | Amendment to a previously filed 8-A12B | Apr 13, 2018 |     |
424B5 | Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 | May 16, 2017 |     |
8-A12B | Registration of certain classes of securities 12(b) of the Securities Exchange Act | May 9, 2017 |     |
424B5 | Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 | May 5, 2017 |     |
424B5 | Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 | May 1, 2017 |     |