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| Form | Description | Date | Format |
|---|---|---|---|
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Sep 30, 2019 |     |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Sep 12, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Sep 12, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Sep 10, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Aug 22, 2019 | |
| SC 13D | Filing by person(s) reporting owned shares of common stock in a public company >5% | Jun 20, 2019 | |
| SC 13D | Filing by person(s) reporting owned shares of common stock in a public company >5% | Jun 19, 2019 | |
| 20-F/A | Amendment to a previously filed 20-F | Jun 12, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | May 29, 2019 | |
| 20-F/A | Amendment to a previously filed 20-F | Apr 19, 2019 |   |
| 20-F | Registration of securities of foreign private issuers pursuant to section 12(b) or (g) | Apr 19, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Mar 1, 2019 | |
| SC 13G/A | Amendment to a previously filed SC 13G | Jan 25, 2019 | |
| SC 13G/A | Amendment to a previously filed SC 13G | Jan 23, 2019 | |
| S-8 | Securities offered to employees pursuant to employee benefit plans | Dec 31, 2018 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Dec 10, 2018 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Nov 15, 2018 | |
