Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-21-005848-index-headers.html | 2021-01-11 08:36:01 | |
| 0001193125-21-005848-index.html | 2021-01-11 08:36:01 | |
| 0001193125-21-005848.txt | 2021-01-11 08:36:01 | |
 0001193125-21-005848-xbrl.zip | 13753 | 2021-01-11 08:36:01 |
| cers-20210111.xsd | 3060 | 2021-01-11 08:36:01 |
| cers-20210111_lab.xml | 18138 | 2021-01-11 08:36:01 |
| cers-20210111_pre.xml | 11401 | 2021-01-11 08:36:01 |
| d33525d8k.htm | 27524 | 2021-01-11 08:36:01 |
| d33525d8k_htm.xml | 3390 | 2021-01-11 08:36:01 |
| d33525dex991.htm | 16989 | 2021-01-11 08:36:01 |
| FilingSummary.xml | 1720 | 2021-01-11 08:36:01 |
| Financial_Report.xlsx | 5463 | 2021-01-11 08:36:01 |
 g33525dsp01.jpg | 5603 | 2021-01-11 08:36:01 |
| MetaLinks.json | 18785 | 2021-01-11 08:36:01 |
| R1.htm | 40154 | 2021-01-11 08:36:01 |
| report.css | 2767 | 2021-01-11 08:36:01 |
| Show.js | 1085 | 2021-01-11 08:36:01 |