| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 06/04/19 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 06/03/19 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/28/19 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/22/19 | SD | Form SD: Specialized Disclosure Report filed pursuant to Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act relating to the use of conflict minerals (Rule 13p-1) | 7 | |
| 05/20/19 | 3 | Form 3: Initial statement of beneficial ownership of securities | 1 | |
| 05/16/19 | 8-K | Form 8-K: Current report filing | 3 | |
| 05/16/19 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/14/19 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/07/19 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/03/19 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |