Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-281036-index-headers.html | 2020-10-29 16:04:55 | |
| 0001193125-20-281036-index.html | 2020-10-29 16:04:55 | |
| 0001193125-20-281036.txt | 2020-10-29 16:04:55 | |
 0001193125-20-281036-xbrl.zip | 19007 | 2020-10-29 16:04:55 |
| cers-20201029.xsd | 3062 | 2020-10-29 16:04:55 |
| cers-20201029_lab.xml | 18140 | 2020-10-29 16:04:55 |
| cers-20201029_pre.xml | 11403 | 2020-10-29 16:04:55 |
| d92850d8k.htm | 26702 | 2020-10-29 16:04:55 |
| d92850d8k_htm.xml | 3390 | 2020-10-29 16:04:55 |
| d92850dex991.htm | 107379 | 2020-10-29 16:04:55 |
| FilingSummary.xml | 1720 | 2020-10-29 16:04:55 |
| Financial_Report.xlsx | 5466 | 2020-10-29 16:04:55 |
 g92850g77l66.jpg | 2516 | 2020-10-29 16:04:55 |
| MetaLinks.json | 18785 | 2020-10-29 16:04:55 |
| R1.htm | 40154 | 2020-10-29 16:04:55 |
| report.css | 2767 | 2020-10-29 16:04:55 |
| Show.js | 1085 | 2020-10-29 16:04:55 |