| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | KHOEHN FORM 4 | 17 Feb 2023 | 16 Feb 2023 | 000-18059 |
| 4 | Open Document | Open Filing | KHOEHN FORM 4 | 11 Feb 2022 | 09 Feb 2022 | 000-18059 |
| 4 | Open Document | Open Filing | KHOEHN FORM 4 | 01 Feb 2022 | 31 Jan 2022 | 000-18059 |
| 4 | Open Document | Open Filing | KHOEHN FORM 4 | 11 Feb 2021 | 10 Feb 2021 | 000-18059 |
| 4 | Open Document | Open Filing | KHOEHN FORM 4 | 13 Feb 2020 | 12 Feb 2020 | 000-18059 |
| 4 | Open Document | Open Filing | FORM 4 | 07 Mar 2019 | 06 Mar 2019 | 000-18059 |
| 4 | Open Document | Open Filing | FORM 4 | 09 Mar 2018 | 08 Mar 2018 | 000-18059 |
| 4 | Open Document | Open Filing | FORM 4 | 06 Jul 2017 | 15 Jun 2017 | 000-18059 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Mar 2017 | 01 Mar 2017 | 000-18059 |
| 4 | Open Document | Open Filing | FORM 4 | 17 Jun 2016 | 15 Jun 2016 | 000-18059 |
| 4 | Open Document | Open Filing | FORM 4 | 03 Mar 2016 | 02 Mar 2016 | 000-18059 |
| 4 | Open Document | Open Filing | FORM 4 | 08 Jun 2015 | 08 Jun 2015 | 000-18059 |
| 3 | Open Document | Open Filing | FORM 3 | 08 Jun 2015 | 08 Jun 2015 | 000-18059 |