| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | May 19, 2022 | May 17, 2022 | 001-15070 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 4, 2021 | Aug 2, 2021 | 001-15070 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 12, 2020 | Jun 10, 2020 | 001-15070 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 17, 2019 | May 15, 2019 | 001-15070 | 
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | May 17, 2019 | May 15, 2019 | 001-15070 |