| Type | Filed | |
|---|---|---|
| 6-K | 2019-05-23 | EDGAR |
| 6-K | 2019-05-21 | EDGAR |
| 6-K | 2019-04-18 | EDGAR |
| 6-K | 2019-04-17 | EDGAR |
| 20-F | 2019-03-21 | EDGAR |
| 6-K | 2019-03-21 | EDGAR |
| 6-K | 2019-03-21 | EDGAR |
| 6-K | 2019-03-21 | EDGAR |
| 6-K | 2019-03-20 | EDGAR |
| SC 13D/A | 2019-03-06 | EDGAR |
| SC 13D/A | 2019-03-06 | EDGAR |
| 6-K | 2019-01-24 | EDGAR |
| 6-K | 2019-01-22 | EDGAR |
| 6-K | 2019-01-15 | EDGAR |
| 6-K | 2018-12-19 | EDGAR |
| 6-K | 2018-12-18 | EDGAR |
| 6-K | 2018-12-17 | EDGAR |
| SC 13D/A | 2018-12-14 | EDGAR |
| SC 13D/A | 2018-12-10 | EDGAR |
| 6-K | 2018-12-04 | EDGAR |