| 8-K | Current report | May 8, 2020 | |
| 10-K | Annual report [Section 13 and 15(d), not S-K Item 405] | March 27, 2020 | |
| 8-K | Current report | March 26, 2020 | |
| 424B3 | Prospectus [Rule 424(b)(3)] | February 25, 2020 | |
| 8-K | Current report | February 25, 2020 | |
| 424B3 | Prospectus [Rule 424(b)(3)] | December 18, 2019 | |
| EFFECT | Notice of Effectiveness | December 6, 2019 | |
| CORRESP | Correspondence | December 4, 2019 | |
| S-1/A | General form for registration of securities under the Securities Act of 1933 | December 4, 2019 | |
| UPLOAD | SEC-generated letter | November 27, 2019 | |