Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001042773-18-000004-index-headers.html | 2018-02-22 06:38:39 | |
| 0001042773-18-000004-index.html | 2018-02-22 06:38:39 | |
| 0001042773-18-000004.txt | 2018-02-22 06:38:39 | |
 0001042773-18-000004-xbrl.zip | 387249 | 2018-02-22 06:38:39 |
| cerc-20171231.xml | 3544916 | 2018-02-22 06:38:39 |
| cerc-20171231.xsd | 61944 | 2018-02-22 06:38:39 |
| cerc-20171231_cal.xml | 113138 | 2018-02-22 06:38:39 |
| cerc-20171231_def.xml | 538072 | 2018-02-22 06:38:39 |
| cerc-20171231_lab.xml | 1138152 | 2018-02-22 06:38:39 |
| cerc-20171231_pre.xml | 645747 | 2018-02-22 06:38:39 |
| cercexhibit12_12312017.htm | 65507 | 2018-02-22 06:38:39 |
| cercexhibit231_12312017.htm | 4122 | 2018-02-22 06:38:39 |
| cercexhibit232_12312017.htm | 3439 | 2018-02-22 06:38:39 |
| cercexhibit311_12312017.htm | 12160 | 2018-02-22 06:38:39 |
| cercexhibit312_12312017.htm | 12311 | 2018-02-22 06:38:39 |
| cercexhibit321_12312017.htm | 6564 | 2018-02-22 06:38:39 |
| cercexhibit322_12312017.htm | 5811 | 2018-02-22 06:38:39 |
| cerc_10kx12312017.htm | 2637892 | 2018-02-22 06:38:39 |
 cesonlycombinedcolor.jpg | 61843 | 2018-02-22 06:38:39 |
| FilingSummary.xml | 36169 | 2018-02-22 06:38:39 |
| Financial_Report.xlsx | 117287 | 2018-02-22 06:38:39 |
 ngddescriptiona02.jpg | 10666 | 2018-02-22 06:38:39 |
 ngdterritory.jpg | 29390 | 2018-02-22 06:38:39 |
| R1.htm | 27683 | 2018-02-22 06:38:39 |
| R10.htm | 48483 | 2018-02-22 06:38:39 |
| R11.htm | 57943 | 2018-02-22 06:38:39 |
| R12.htm | 44107 | 2018-02-22 06:38:39 |
| R13.htm | 64804 | 2018-02-22 06:38:39 |
| R14.htm | 50056 | 2018-02-22 06:38:39 |
| R15.htm | 199846 | 2018-02-22 06:38:39 |
| R16.htm | 22357 | 2018-02-22 06:38:39 |
| R17.htm | 171850 | 2018-02-22 06:38:39 |
| R18.htm | 147189 | 2018-02-22 06:38:39 |
| R19.htm | 122499 | 2018-02-22 06:38:39 |
| R2.htm | 40760 | 2018-02-22 06:38:39 |
| R20.htm | 95701 | 2018-02-22 06:38:39 |
| R21.htm | 93176 | 2018-02-22 06:38:39 |
| R22.htm | 35266 | 2018-02-22 06:38:39 |
| R23.htm | 34916 | 2018-02-22 06:38:39 |
| R24.htm | 169628 | 2018-02-22 06:38:39 |
| R25.htm | 5749 | 2018-02-22 06:38:39 |
| R26.htm | 92638 | 2018-02-22 06:38:39 |
| R27.htm | 58140 | 2018-02-22 06:38:39 |
| R28.htm | 44303 | 2018-02-22 06:38:39 |
| R29.htm | 60332 | 2018-02-22 06:38:39 |
| R3.htm | 17518 | 2018-02-22 06:38:39 |
| R30.htm | 47458 | 2018-02-22 06:38:39 |
| R31.htm | 179723 | 2018-02-22 06:38:39 |
| R32.htm | 18736 | 2018-02-22 06:38:39 |
| R33.htm | 163424 | 2018-02-22 06:38:39 |
| R34.htm | 144459 | 2018-02-22 06:38:39 |
| R35.htm | 111705 | 2018-02-22 06:38:39 |
| R36.htm | 93949 | 2018-02-22 06:38:39 |
| R37.htm | 89057 | 2018-02-22 06:38:39 |
| R38.htm | 22076 | 2018-02-22 06:38:39 |
| R39.htm | 34698 | 2018-02-22 06:38:39 |
| R4.htm | 6475 | 2018-02-22 06:38:39 |
| R40.htm | 181809 | 2018-02-22 06:38:39 |
| R41.htm | 10020 | 2018-02-22 06:38:39 |
| R42.htm | 10039 | 2018-02-22 06:38:39 |
| R43.htm | 39108 | 2018-02-22 06:38:39 |
| R44.htm | 66572 | 2018-02-22 06:38:39 |
| R45.htm | 56450 | 2018-02-22 06:38:39 |
| R46.htm | 66734 | 2018-02-22 06:38:39 |
| R47.htm | 182521 | 2018-02-22 06:38:39 |
| R48.htm | 83863 | 2018-02-22 06:38:39 |
| R49.htm | 15384 | 2018-02-22 06:38:39 |
| R5.htm | 112173 | 2018-02-22 06:38:39 |
| R50.htm | 16023 | 2018-02-22 06:38:39 |
| R51.htm | 130975 | 2018-02-22 06:38:39 |
| R52.htm | 141672 | 2018-02-22 06:38:39 |
| R53.htm | 158164 | 2018-02-22 06:38:39 |
| R54.htm | 96007 | 2018-02-22 06:38:39 |
| R55.htm | 111005 | 2018-02-22 06:38:39 |
| R56.htm | 53474 | 2018-02-22 06:38:39 |
| R57.htm | 12803 | 2018-02-22 06:38:39 |
| R58.htm | 90661 | 2018-02-22 06:38:39 |
| R59.htm | 13617 | 2018-02-22 06:38:39 |
| R6.htm | 4958 | 2018-02-22 06:38:39 |
| R60.htm | 13565 | 2018-02-22 06:38:39 |
| R7.htm | 107022 | 2018-02-22 06:38:39 |
| R8.htm | 29772 | 2018-02-22 06:38:39 |
| R9.htm | 9039 | 2018-02-22 06:38:39 |
| report.css | 2767 | 2018-02-22 06:38:39 |
| Show.js | 1410 | 2018-02-22 06:38:39 |