| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jun 1, 2021 | Jun 1, 2021 | 000-23575 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 30, 2020 | Apr 29, 2020 | 000-23575 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 7, 2018 | Nov 7, 2018 | 000-23575 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 26, 2018 | Oct 25, 2018 | 000-23575 |
| 4 | Open Document | Open Filing | FORM 4 | Aug 25, 2017 | Aug 24, 2017 | 000-23575 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 24, 2015 | Apr 23, 2015 | 000-23575 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 4, 2014 | Mar 3, 2014 | 000-23575 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 28, 2014 | Feb 27, 2014 | 000-23575 |