Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-21-022820-index-headers.html | 2021-01-29 17:16:00 | |
| 0001193125-21-022820-index.html | 2021-01-29 17:16:00 | |
| 0001193125-21-022820.txt | 2021-01-29 17:16:00 | |
 0001193125-21-022820-xbrl.zip | 8022 | 2021-01-29 17:16:00 |
| cers-20210125.xsd | 3061 | 2021-01-29 17:16:00 |
| cers-20210125_lab.xml | 18139 | 2021-01-29 17:16:00 |
| cers-20210125_pre.xml | 11402 | 2021-01-29 17:16:00 |
| d28036d8k.htm | 23970 | 2021-01-29 17:16:00 |
| d28036d8k_htm.xml | 3432 | 2021-01-29 17:16:00 |
| FilingSummary.xml | 1686 | 2021-01-29 17:16:00 |
| Financial_Report.xlsx | 5461 | 2021-01-29 17:16:00 |
| MetaLinks.json | 18755 | 2021-01-29 17:16:00 |
| R1.htm | 40147 | 2021-01-29 17:16:00 |
| report.css | 2766 | 2021-01-29 17:16:00 |
| Show.js | 1084 | 2021-01-29 17:16:00 |