Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-019604-index-headers.html | 2020-01-30 16:04:40 | |
| 0001193125-20-019604-index.html | 2020-01-30 16:04:40 | |
| 0001193125-20-019604.txt | 2020-01-30 16:04:40 | |
 0001193125-20-019604-xbrl.zip | 46703 | 2020-01-30 16:04:40 |
| cers-20200128.xsd | 3062 | 2020-01-30 16:04:40 |
| cers-20200128_lab.xml | 18140 | 2020-01-30 16:04:40 |
| cers-20200128_pre.xml | 11403 | 2020-01-30 16:04:40 |
| d856695d8k.htm | 34781 | 2020-01-30 16:04:40 |
| d856695d8k_htm.xml | 3383 | 2020-01-30 16:04:40 |
| d856695dex11.htm | 167128 | 2020-01-30 16:04:40 |
| d856695dex51.htm | 7987 | 2020-01-30 16:04:40 |
| FilingSummary.xml | 1762 | 2020-01-30 16:04:40 |
| Financial_Report.xlsx | 5797 | 2020-01-30 16:04:40 |
 g856695g0129112138228.jpg | 2412 | 2020-01-30 16:04:40 |
| MetaLinks.json | 18761 | 2020-01-30 16:04:40 |
| R1.htm | 40147 | 2020-01-30 16:04:40 |
| report.css | 2767 | 2020-01-30 16:04:40 |
| Show.js | 1085 | 2020-01-30 16:04:40 |