| Form type | Sec Links | Description | Filing date | Reporting date |
|---|---|---|---|---|
| SC 13G | Report | 13G | Sep 22, 2023 | |
| SC 13G/A | Report | AMENDMENT NO. 3 TO SCHEDULE 13G | Feb 11, 2022 | |
| SC 13G | Report | SC 13G | Jun 17, 2021 | |
| SC 13G/A | Report | CHEK 13GA | Feb 9, 2021 | |
| SC 13G/A | Report | AMENDMENT NO. 2 TO SCHEDULE 13G | Jan 29, 2021 | |
| SC 13G/A | Report | SABBY 13G-A CHEK 1.05.21 | Jan 5, 2021 | |
| SC 13G | Report | May 21, 2020 | ||
| SC 13G | Report | Apr 30, 2020 | ||
| SC 13G | Report | SABBY 13G CHEK 4.20.20 | Apr 20, 2020 | |
| SC 13G/A | Report | AMENDMENT NO. 1 | Apr 9, 2020 | |
| SC 13G/A | Report | AMENDMENT NO. 1 TO SCHEDULE 13G | Feb 11, 2020 | |
| SC 13G | Report | CHEK 13G | Feb 5, 2020 | |
| SC 13G | Report | Feb 15, 2019 | ||
| SC 13G | Report | SC 13G | Feb 13, 2019 | |
| SC 13G | Report | SCHEDULE 13G | Feb 12, 2019 | |
| SC 13G/A | Report | SABBY 13G-A CHEK 1.03.19 | Jan 3, 2019 | |
| SC 13G/A | Report | Feb 14, 2018 | ||
| SC 13G/A | Report | SC 13G/A | Feb 7, 2018 | |
| SC 13G/A | Report | SABBY 13G-A CHEK 1.09.18 | Jan 9, 2018 | |
| SC 13G | Report | Nov 30, 2017 | ||
| SC 13G | Report | SABBY 13G CHEK 6.01.17 | Jun 1, 2017 | |
| SC 13G/A | Report | SC 13G/A | Jan 20, 2017 | |
| SC 13G/A | Report | SC 13G/A | Jan 28, 2016 | |
| SC 13G/A | Report | SC 13G/A | May 15, 2015 | |
| SC 13G | Report | SC 13G | Mar 17, 2015 | |
| SC 13G | Report | QUANT GLOBAL CAPITAL ADVISORS, LLC | Mar 6, 2015 |