Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-21-316919-index-headers.html | 2021-11-02 16:03:08 | |
| 0001193125-21-316919-index.html | 2021-11-02 16:03:08 | |
| 0001193125-21-316919.txt | 2021-11-02 16:03:08 | |
 0001193125-21-316919-xbrl.zip | 18619 | 2021-11-02 16:03:08 |
| cers-20211102.xsd | 2883 | 2021-11-02 16:03:08 |
| cers-20211102_lab.xml | 18139 | 2021-11-02 16:03:08 |
| cers-20211102_pre.xml | 11402 | 2021-11-02 16:03:08 |
| d220853d8k.htm | 26361 | 2021-11-02 16:03:08 |
| d220853d8k_htm.xml | 3390 | 2021-11-02 16:03:08 |
| d220853dex991.htm | 113336 | 2021-11-02 16:03:08 |
| FilingSummary.xml | 1724 | 2021-11-02 16:03:08 |
| Financial_Report.xlsx | 5686 | 2021-11-02 16:03:08 |
 g220853dsp4.jpg | 3059 | 2021-11-02 16:03:08 |
| MetaLinks.json | 18478 | 2021-11-02 16:03:08 |
| R1.htm | 40155 | 2021-11-02 16:03:08 |
| report.css | 2767 | 2021-11-02 16:03:08 |
| Show.js | 1085 | 2021-11-02 16:03:08 |