| 20-F | Registration of securities of foreign private issuers pursuant to section 12(b) or (g) | Mar 15, 2019 |  |  |  |
| | 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Mar 15, 2019 | | | |
| | 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Feb 27, 2019 | | | |
| | SC 13G/A | An amendment to the SC 13G filing | Feb 13, 2019 | | | |
| | SC 13G | A statement of beneficial ownership of common stock by certain persons | Feb 01, 2019 | | | |
| | SC 13G | A statement of beneficial ownership of common stock by certain persons | Feb 01, 2019 | | | |
| | SC 13G/A | An amendment to the SC 13G filing | Jan 09, 2019 | | | |
| | 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Jan 02, 2019 | | | |
| | 424B2 | Form of prospectus filed in connection with primary offering of securities on a delayed basis | Dec 06, 2018 | | | |
| | 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Dec 06, 2018 | | | |
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