Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-21-008958-index-headers.html | 2021-02-25 17:20:41 | |
| 0001564590-21-008958-index.html | 2021-02-25 17:20:41 | |
| 0001564590-21-008958.txt | 2021-02-25 17:20:41 | |
 0001564590-21-008958-xbrl.zip | 458996 | 2021-02-25 17:20:41 |
| cers-10k_20201231.htm | 3907943 | 2021-02-25 17:20:41 |
| cers-10k_20201231_htm.xml | 3158931 | 2021-02-25 17:20:41 |
| cers-20201231.xsd | 79647 | 2021-02-25 17:20:41 |
| cers-20201231_cal.xml | 92160 | 2021-02-25 17:20:41 |
| cers-20201231_def.xml | 264600 | 2021-02-25 17:20:41 |
| cers-20201231_lab.xml | 630907 | 2021-02-25 17:20:41 |
| cers-20201231_pre.xml | 476982 | 2021-02-25 17:20:41 |
| cers-ex1014_181.htm | 57328 | 2021-02-25 17:20:41 |
| cers-ex1016_182.htm | 63690 | 2021-02-25 17:20:41 |
| cers-ex102_179.htm | 21064 | 2021-02-25 17:20:41 |
| cers-ex108_180.htm | 33241 | 2021-02-25 17:20:41 |
| cers-ex211_11.htm | 3484 | 2021-02-25 17:20:41 |
| cers-ex231_12.htm | 3248 | 2021-02-25 17:20:41 |
| cers-ex311_15.htm | 16038 | 2021-02-25 17:20:41 |
| cers-ex312_14.htm | 16058 | 2021-02-25 17:20:41 |
| cers-ex321_13.htm | 6856 | 2021-02-25 17:20:41 |
| FilingSummary.xml | 52663 | 2021-02-25 17:20:41 |
| Financial_Report.xlsx | 119276 | 2021-02-25 17:20:41 |
 gyjvqnxhp1i2000001.jpg | 96332 | 2021-02-25 17:20:41 |
| MetaLinks.json | 881636 | 2021-02-25 17:20:41 |
| R1.htm | 65314 | 2021-02-25 17:20:41 |
| R10.htm | 298386 | 2021-02-25 17:20:41 |
| R11.htm | 19227 | 2021-02-25 17:20:41 |
| R12.htm | 48001 | 2021-02-25 17:20:41 |
| R13.htm | 6193 | 2021-02-25 17:20:41 |
| R14.htm | 22901 | 2021-02-25 17:20:41 |
| R15.htm | 103873 | 2021-02-25 17:20:41 |
| R16.htm | 45674 | 2021-02-25 17:20:41 |
| R17.htm | 8900 | 2021-02-25 17:20:41 |
| R18.htm | 172977 | 2021-02-25 17:20:41 |
| R19.htm | 9317 | 2021-02-25 17:20:41 |
| R2.htm | 96008 | 2021-02-25 17:20:41 |
| R20.htm | 40684 | 2021-02-25 17:20:41 |
| R21.htm | 320579 | 2021-02-25 17:20:41 |
| R22.htm | 101340 | 2021-02-25 17:20:41 |
| R23.htm | 5996 | 2021-02-25 17:20:41 |
| R24.htm | 235871 | 2021-02-25 17:20:41 |
| R25.htm | 137872 | 2021-02-25 17:20:41 |
| R26.htm | 294819 | 2021-02-25 17:20:41 |
| R27.htm | 19920 | 2021-02-25 17:20:41 |
| R28.htm | 46367 | 2021-02-25 17:20:41 |
| R29.htm | 22189 | 2021-02-25 17:20:41 |
| R3.htm | 18950 | 2021-02-25 17:20:41 |
| R30.htm | 98448 | 2021-02-25 17:20:41 |
| R31.htm | 44167 | 2021-02-25 17:20:41 |
| R32.htm | 168119 | 2021-02-25 17:20:41 |
| R33.htm | 34512 | 2021-02-25 17:20:41 |
| R34.htm | 252752 | 2021-02-25 17:20:41 |
| R35.htm | 98423 | 2021-02-25 17:20:41 |
| R36.htm | 16658 | 2021-02-25 17:20:41 |
| R37.htm | 57590 | 2021-02-25 17:20:41 |
| R38.htm | 21682 | 2021-02-25 17:20:41 |
| R39.htm | 13105 | 2021-02-25 17:20:41 |
| R4.htm | 61280 | 2021-02-25 17:20:41 |
| R40.htm | 26494 | 2021-02-25 17:20:41 |
| R41.htm | 18498 | 2021-02-25 17:20:41 |
| R42.htm | 15551 | 2021-02-25 17:20:41 |
| R43.htm | 14548 | 2021-02-25 17:20:41 |
| R44.htm | 33282 | 2021-02-25 17:20:41 |
| R45.htm | 7411 | 2021-02-25 17:20:41 |
| R46.htm | 9502 | 2021-02-25 17:20:41 |
| R47.htm | 23095 | 2021-02-25 17:20:41 |
| R48.htm | 7842 | 2021-02-25 17:20:41 |
| R49.htm | 8870 | 2021-02-25 17:20:41 |
| R5.htm | 18926 | 2021-02-25 17:20:41 |
| R50.htm | 12370 | 2021-02-25 17:20:41 |
| R51.htm | 20722 | 2021-02-25 17:20:41 |
| R52.htm | 31436 | 2021-02-25 17:20:41 |
| R53.htm | 48188 | 2021-02-25 17:20:41 |
| R54.htm | 13910 | 2021-02-25 17:20:41 |
| R55.htm | 11539 | 2021-02-25 17:20:41 |
| R56.htm | 20696 | 2021-02-25 17:20:41 |
| R57.htm | 32051 | 2021-02-25 17:20:41 |
| R58.htm | 73524 | 2021-02-25 17:20:41 |
| R59.htm | 23694 | 2021-02-25 17:20:41 |
| R6.htm | 44120 | 2021-02-25 17:20:41 |
| R60.htm | 27127 | 2021-02-25 17:20:41 |
| R61.htm | 37481 | 2021-02-25 17:20:41 |
| R62.htm | 10431 | 2021-02-25 17:20:41 |
| R63.htm | 18511 | 2021-02-25 17:20:41 |
| R64.htm | 9932 | 2021-02-25 17:20:41 |
| R65.htm | 42099 | 2021-02-25 17:20:41 |
| R66.htm | 10412 | 2021-02-25 17:20:41 |
| R67.htm | 7531 | 2021-02-25 17:20:41 |
| R68.htm | 12439 | 2021-02-25 17:20:41 |
| R69.htm | 26610 | 2021-02-25 17:20:41 |
| R7.htm | 87401 | 2021-02-25 17:20:41 |
| R70.htm | 25214 | 2021-02-25 17:20:41 |
| R71.htm | 28343 | 2021-02-25 17:20:41 |
| R72.htm | 4619 | 2021-02-25 17:20:41 |
| R73.htm | 30072 | 2021-02-25 17:20:41 |
| R74.htm | 8837 | 2021-02-25 17:20:41 |
| R75.htm | 4873 | 2021-02-25 17:20:41 |
| R76.htm | 11712 | 2021-02-25 17:20:41 |
| R77.htm | 21919 | 2021-02-25 17:20:41 |
| R78.htm | 8623 | 2021-02-25 17:20:41 |
| R79.htm | 5504 | 2021-02-25 17:20:41 |
| R8.htm | 7131 | 2021-02-25 17:20:41 |
| R9.htm | 181199 | 2021-02-25 17:20:41 |
| report.css | 2767 | 2021-02-25 17:20:41 |
| Show.js | 1085 | 2021-02-25 17:20:41 |