| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | May 27, 2021 | May 25, 2021 | 001-39468 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 3, 2020 | Dec 1, 2020 | 001-39468 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 9, 2020 | Sep 4, 2020 | 001-39468 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 26, 2020 | Jun 24, 2020 | 000-55242 |
| 4 | Open Document | Open Filing | FORM 4 | Jun 9, 2020 | Jun 5, 2020 | 000-55242 |
| 4 | Open Document | Open Filing | FORM 4 | Sep 24, 2019 | Sep 20, 2019 | 000-55242 |
| 4/A | Open Document | Open Filing | FORM 4/A | Sep 24, 2019 | May 16, 2018 | 000-55242 |
| 4 | Open Document | Open Filing | FORM 4 | May 23, 2019 | May 21, 2019 | 000-55242 |
| 4 | Open Document | Open Filing | SCHAFFER FORM 4 | Jun 14, 2018 | May 16, 2018 | 000-55242 |
| 4 | Open Document | Open Filing | SCHAFFER FORM 4 - 2017-03-17 | Mar 21, 2017 | Mar 17, 2017 | 000-55242 |
| 4 | Open Document | Open Filing | SCHAFFER 12-12-16 OPTION GRANT | Dec 14, 2016 | Dec 12, 2016 | 000-55242 |
| 4 | Open Document | Open Filing | JUNE 2016 PIPE FORM 4 | Jun 28, 2016 | Jun 24, 2016 | 000-55242 |
| 3 | Open Document | Open Filing | FORM 3 | Sep 14, 2015 | Sep 4, 2015 | 000-55242 |