| Form | Description | Date | Format |
|---|---|---|---|
| 8-K | Report of unscheduled material events or corporate event | Dec 15, 2017 |  Open Report of unscheduled material events or corporate event in HTML. Open Report of unscheduled material events or corporate event in DOC file. Open Report of unscheduled material events or corporate event in PDF file. Open Report of unscheduled material events or corporate event in XLS file. |