| 8-K | Current report | August 26, 2020 | |
| SC 13D | General statement of acquisition of beneficial ownership | August 19, 2020 | |
| SC 13D/A | General statement of acquisition of beneficial ownership | August 14, 2020 | |
| SC 13D | General statement of acquisition of beneficial ownership | August 14, 2020 | |
| 10-Q | Quarterly report [Sections 13 or 15(d)] | August 10, 2020 | |
| 4 | Statement of changes in beneficial ownership of securities | August 7, 2020 | |
| 4 | Statement of changes in beneficial ownership of securities | August 6, 2020 | |
| 4 | Statement of changes in beneficial ownership of securities | August 6, 2020 | |
| 8-K | Current report | August 3, 2020 | |
| SC 13G | Statement of acquisition of beneficial ownership by individuals | July 7, 2020 | |