| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 06/06/18 | 8-K | Form 8-K: Current report filing | 125 | |
| 05/30/18 | 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) | 17 | |
| 05/18/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/17/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/17/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/17/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/17/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/17/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/17/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/09/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |