| Type | Description | Date | |
| DEF 14C | DEF 14C - Other definitive information statements | February 26, 2019 | |
| PRE 14C | PRE 14C - Other preliminary information statements | February 13, 2019 | |
| 4 | 4 - Statement of changes in beneficial ownership of securities | February 8, 2019 | |
| 424B3 | 424B3 - Prospectus [Rule 424(b)(3)] | February 7, 2019 | |
| 10-K | 10-K - Annual report [Section 13 and 15(d), not S-K Item 405] | February 6, 2019 | |
| 424B3 | 424B3 - Prospectus [Rule 424(b)(3)] | January 31, 2019 | |
| 424B3 | 424B3 - Prospectus [Rule 424(b)(3)] | January 22, 2019 | |
| 424B3 | 424B3 - Prospectus [Rule 424(b)(3)] | January 9, 2019 | |
| D | D - Notice of Exempt Offering of Securities | December 21, 2018 | |
| 8-K | 8-K - Current report | December 19, 2018 | |
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