| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 22 Jul 2021 | 21 Jul 2021 | 001-08568 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jan 2021 | 04 Jan 2021 | 001-08568 |
| 4 | Open Document | Open Filing | FORM 4 | 03 Jan 2020 | 02 Jan 2020 | 001-08568 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Oct 2019 | 02 Oct 2019 | 001-08568 |
| 4 | Open Document | Open Filing | FORM 4 | 03 Jul 2019 | 01 Jul 2019 | 001-08568 |
| 4 | Open Document | Open Filing | FORM 4 | 31 May 2019 | 31 May 2019 | 001-08568 |
| 4 | Open Document | Open Filing | FORM 4 | 15 May 2019 | 13 May 2019 | 001-08568 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Jan 2019 | 02 Jan 2019 | 001-08568 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Jan 2018 | 02 Jan 2018 | 001-08568 |
| 4 | Open Document | Open Filing | FORM 4 | 05 Jan 2017 | 03 Jan 2017 | 001-08568 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 06 Jan 2016 | 04 Jan 2016 | 001-08568 |
| 3 | Open Document | Open Filing | FORM 3 | 26 Mar 2015 | 17 Mar 2015 | 001-08568 |