| Major company event | 8-K | 2019-08-08 | 2019-08-08 |
| Quarterly report | 10-Q | 2019-08-08 | 2019-06-29 |
| Insider trade | 4 | 2019-07-02 | 2019-06-28 |
| Employee plan annual report | 11-K | 2019-06-28 | 2018-12-31 |
| Insider trade | 4 | 2019-06-19 | 2019-06-17 |
| Activist ownership stake (update) | SC 13D/A | 2019-05-17 | - |
| Major company event | 8-K | 2019-05-08 | 2019-05-08 |
| Quarterly report | 10-Q | 2019-05-08 | 2019-03-30 |
| Insider trade | 4 | 2019-04-01 | 2019-03-28 |
| Major company event | 8-K | 2019-02-15 | 2019-02-15 |
| Passive ownership stake | SC 13G | 2019-02-13 | - |
| Passive ownership stake (update) | SC 13G/A | 2019-02-12 | - |
| Passive ownership stake (update) | SC 13G/A | 2019-02-08 | - |
| Major company event | 8-K | 2019-02-07 | 2019-02-07 |
| Quarterly report | 10-Q | 2019-02-07 | 2018-12-29 |
| Passive ownership stake (update) | SC 13G/A | 2019-02-06 | - |
| Passive ownership stake (update) | SC 13G/A | 2019-02-04 | - |
| Proxy statement | DEF 14A | 2018-12-27 | 2019-02-12 |
| Major company event | 8-K | 2018-12-07 | 2018-12-07 |
| Annual report | 10-K | 2018-12-07 | 2018-09-29 |
| Insider trade | 4 | 2018-08-24 | 2017-11-03 |
| Insider trade | 4 | 2018-08-22 | 2018-08-21 |
| Major company event | 8-K | 2018-08-09 | 2018-08-09 |
| Quarterly report | 10-Q | 2018-08-09 | 2018-06-30 |
| Employee plan annual report | 11-K | 2018-06-28 | 2017-12-31 |
| Major company event | 8-K | 2018-05-10 | 2018-05-10 |
| Quarterly report | 10-Q | 2018-05-09 | 2018-03-31 |
| New insider ownership | 3 | 2018-05-08 | 2018-04-24 |
| Major company event | 8-K | 2018-04-26 | 2018-04-26 |
| DEFR14A | - | 2018-03-13 | - |
| Activist ownership stake (update) | SC 13D/A | 2018-03-13 | - |
| Proxy statement | DEF 14A | 2018-03-12 | 2018-04-24 |
| SEC correspondence | UPLOAD | 2018-03-06 | - |
| Company correspondence | CORRESP | 2018-03-02 | - |
| SEC correspondence | UPLOAD | 2018-02-15 | - |
| Passive ownership stake | SC 13G | 2018-02-13 | - |
| Passive ownership stake (update) | SC 13G/A | 2018-02-09 | - |
| Passive ownership stake (update) | SC 13G/A | 2018-02-09 | - |
| Major company event | 8-K | 2018-02-09 | 2018-02-09 |
| Passive ownership stake (update) | SC 13G/A | 2018-02-09 | - |
| Quarterly report | 10-Q | 2018-02-08 | 2017-12-30 |
| Annual report (amended) | 10-K/A | 2018-01-26 | 2017-09-30 |
| Insider trade | 4 | 2018-01-25 | 2017-04-27 |
| 3/A | - | 2018-01-25 | 2011-12-13 |
| Passive ownership stake (update) | SC 13G/A | 2018-01-25 | - |
| PRRN14A | - | 2017-12-26 | - |
| Activist ownership stake (update) | SC 13D/A | 2017-12-26 | - |
| SEC correspondence | UPLOAD | 2017-12-22 | - |
| PREC14A | - | 2017-12-15 | - |
| Activist ownership stake (update) | SC 13D/A | 2017-12-15 | - |
