| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 3, 2024 | May 3, 2024 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 14, 2023 | Dec 11, 2023 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 28, 2023 | Mar 7, 2023 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 9, 2022 | Mar 7, 2022 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 26, 2021 | Mar 2, 2021 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 26, 2021 | Feb 24, 2021 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 26, 2020 | Jun 23, 2020 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 23, 2020 | Jun 19, 2020 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 15, 2020 | Apr 9, 2020 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 2, 2020 | Mar 31, 2020 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 28, 2020 | Feb 25, 2020 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 27, 2019 | Nov 18, 2019 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 27, 2018 | Jul 27, 2018 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 22, 2018 | Mar 22, 2018 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2018 | Dec 11, 2017 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 26, 2017 | Jun 23, 2017 | 000-13273 | 
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 21, 2016 | Jun 8, 2016 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 8, 2016 | Jun 8, 2016 | 000-13273 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 24, 2014 | Mar 20, 2014 | 000-13273 |