Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-21-234936-index-headers.html | 2021-08-03 16:10:35 | |
| 0001193125-21-234936-index.html | 2021-08-03 16:10:35 | |
| 0001193125-21-234936.txt | 2021-08-03 16:10:35 | |
 0001193125-21-234936-xbrl.zip | 19065 | 2021-08-03 16:10:35 |
| cers-20210803.xsd | 2915 | 2021-08-03 16:10:35 |
| cers-20210803_lab.xml | 18138 | 2021-08-03 16:10:35 |
| cers-20210803_pre.xml | 11423 | 2021-08-03 16:10:35 |
| d199644d8k.htm | 26492 | 2021-08-03 16:10:35 |
| d199644d8k_htm.xml | 3390 | 2021-08-03 16:10:35 |
| d199644dex991.htm | 107973 | 2021-08-03 16:10:35 |
| FilingSummary.xml | 1735 | 2021-08-03 16:10:35 |
| Financial_Report.xlsx | 5687 | 2021-08-03 16:10:35 |
 g199644g41u68.jpg | 2389 | 2021-08-03 16:10:35 |
| MetaLinks.json | 19007 | 2021-08-03 16:10:35 |
| R1.htm | 40155 | 2021-08-03 16:10:35 |
| report.css | 2767 | 2021-08-03 16:10:35 |
| Show.js | 1085 | 2021-08-03 16:10:35 |