Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-043456-index-headers.html | 2020-02-20 16:08:40 | |
| 0001193125-20-043456-index.html | 2020-02-20 16:08:40 | |
| 0001193125-20-043456.txt | 2020-02-20 16:08:40 | |
 0001193125-20-043456-xbrl.zip | 17317 | 2020-02-20 16:08:40 |
| cers-20200220.xsd | 3062 | 2020-02-20 16:08:40 |
| cers-20200220_lab.xml | 18140 | 2020-02-20 16:08:40 |
| cers-20200220_pre.xml | 11403 | 2020-02-20 16:08:40 |
| d871007d8k.htm | 28976 | 2020-02-20 16:08:40 |
| d871007d8k_htm.xml | 3383 | 2020-02-20 16:08:40 |
| d871007dex991.htm | 78110 | 2020-02-20 16:08:40 |
| FilingSummary.xml | 1729 | 2020-02-20 16:08:40 |
| Financial_Report.xlsx | 5797 | 2020-02-20 16:08:40 |
 g871007img01.jpg | 6748 | 2020-02-20 16:08:40 |
| MetaLinks.json | 18731 | 2020-02-20 16:08:40 |
| R1.htm | 40148 | 2020-02-20 16:08:40 |
| report.css | 2767 | 2020-02-20 16:08:40 |
| Show.js | 1085 | 2020-02-20 16:08:40 |