| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 06/13/18 | 8-K | Form 8-K: Current report filing | 6 | |
| 06/12/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 06/11/18 | 3/A | Form 3/A: Initial statement of beneficial ownership of securities | 1 | |
| 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) | 18 | |
| 05/21/18 | DEFR14A | Form DEFR14A: Definitive revised proxy soliciting materials | 39 | |
| 05/21/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/18/18 | SC 13D | Form SC 13D: Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities | 25 | |
| 05/18/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/18/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/18/18 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |