Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-21-003082-index-headers.html | 2021-01-06 16:02:53 | |
| 0001193125-21-003082-index.html | 2021-01-06 16:02:53 | |
| 0001193125-21-003082.txt | 2021-01-06 16:02:53 | |
 0001193125-21-003082-xbrl.zip | 8706 | 2021-01-06 16:02:53 |
| cers-20201231.xsd | 3059 | 2021-01-06 16:02:53 |
| cers-20201231_lab.xml | 18137 | 2021-01-06 16:02:53 |
| cers-20201231_pre.xml | 11400 | 2021-01-06 16:02:53 |
| d12933d8k.htm | 27282 | 2021-01-06 16:02:53 |
| d12933d8k_htm.xml | 3383 | 2021-01-06 16:02:53 |
| FilingSummary.xml | 1686 | 2021-01-06 16:02:53 |
| Financial_Report.xlsx | 5461 | 2021-01-06 16:02:53 |
| MetaLinks.json | 18785 | 2021-01-06 16:02:53 |
| R1.htm | 40147 | 2021-01-06 16:02:53 |
| report.css | 2766 | 2021-01-06 16:02:53 |
| Show.js | 1084 | 2021-01-06 16:02:53 |