Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-17-008860-index-headers.html | 2017-05-04 17:27:03 | |
| 0001564590-17-008860-index.html | 2017-05-04 17:27:03 | |
| 0001564590-17-008860.txt | 2017-05-04 17:27:03 | |
 0001564590-17-008860-xbrl.zip | 182423 | 2017-05-04 17:27:03 |
| extr-10q_20170331.htm | 2710918 | 2017-05-04 17:27:03 |
| extr-20170331.xml | 2799361 | 2017-05-04 17:27:03 |
| extr-20170331.xsd | 60226 | 2017-05-04 17:27:03 |
| extr-20170331_cal.xml | 71275 | 2017-05-04 17:27:03 |
| extr-20170331_def.xml | 219150 | 2017-05-04 17:27:03 |
| extr-20170331_lab.xml | 508742 | 2017-05-04 17:27:03 |
| extr-20170331_pre.xml | 407571 | 2017-05-04 17:27:03 |
| extr-ex101_64.htm | 52195 | 2017-05-04 17:27:03 |
| extr-ex102_341.htm | 338073 | 2017-05-04 17:27:03 |
| extr-ex22_269.htm | 89025 | 2017-05-04 17:27:03 |
| extr-ex311_10.htm | 18937 | 2017-05-04 17:27:03 |
| extr-ex312_9.htm | 19105 | 2017-05-04 17:27:03 |
| extr-ex321_7.htm | 7250 | 2017-05-04 17:27:03 |
| extr-ex322_6.htm | 7184 | 2017-05-04 17:27:03 |
| FilingSummary.xml | 47117 | 2017-05-04 17:27:03 |
| Financial_Report.xlsx | 85457 | 2017-05-04 17:27:03 |
| R1.htm | 21945 | 2017-05-04 17:27:03 |
| R10.htm | 20001 | 2017-05-04 17:27:03 |
| R11.htm | 464655 | 2017-05-04 17:27:03 |
| R12.htm | 100141 | 2017-05-04 17:27:03 |
| R13.htm | 212867 | 2017-05-04 17:27:03 |
| R14.htm | 66160 | 2017-05-04 17:27:03 |
| R15.htm | 22830 | 2017-05-04 17:27:03 |
| R16.htm | 11960 | 2017-05-04 17:27:03 |
| R17.htm | 76102 | 2017-05-04 17:27:03 |
| R18.htm | 12505 | 2017-05-04 17:27:03 |
| R19.htm | 105821 | 2017-05-04 17:27:03 |
| R2.htm | 83137 | 2017-05-04 17:27:03 |
| R20.htm | 78533 | 2017-05-04 17:27:03 |
| R21.htm | 146664 | 2017-05-04 17:27:03 |
| R22.htm | 471832 | 2017-05-04 17:27:03 |
| R23.htm | 91116 | 2017-05-04 17:27:03 |
| R24.htm | 213069 | 2017-05-04 17:27:03 |
| R25.htm | 59383 | 2017-05-04 17:27:03 |
| R26.htm | 76220 | 2017-05-04 17:27:03 |
| R27.htm | 104128 | 2017-05-04 17:27:03 |
| R28.htm | 21374 | 2017-05-04 17:27:03 |
| R29.htm | 44127 | 2017-05-04 17:27:03 |
| R3.htm | 20726 | 2017-05-04 17:27:03 |
| R30.htm | 13590 | 2017-05-04 17:27:03 |
| R31.htm | 15039 | 2017-05-04 17:27:03 |
| R32.htm | 5353 | 2017-05-04 17:27:03 |
| R33.htm | 21543 | 2017-05-04 17:27:03 |
| R34.htm | 10978 | 2017-05-04 17:27:03 |
| R35.htm | 60984 | 2017-05-04 17:27:03 |
| R36.htm | 9741 | 2017-05-04 17:27:03 |
| R37.htm | 19038 | 2017-05-04 17:27:03 |
| R38.htm | 38826 | 2017-05-04 17:27:03 |
| R39.htm | 10604 | 2017-05-04 17:27:03 |
| R4.htm | 70914 | 2017-05-04 17:27:03 |
| R40.htm | 7368 | 2017-05-04 17:27:03 |
| R41.htm | 17681 | 2017-05-04 17:27:03 |
| R42.htm | 25197 | 2017-05-04 17:27:03 |
| R43.htm | 10983 | 2017-05-04 17:27:03 |
| R44.htm | 12985 | 2017-05-04 17:27:03 |
| R45.htm | 12719 | 2017-05-04 17:27:03 |
| R46.htm | 12748 | 2017-05-04 17:27:03 |
| R47.htm | 26364 | 2017-05-04 17:27:03 |
| R48.htm | 16244 | 2017-05-04 17:27:03 |
| R49.htm | 10959 | 2017-05-04 17:27:03 |
| R5.htm | 17515 | 2017-05-04 17:27:03 |
| R50.htm | 17482 | 2017-05-04 17:27:03 |
| R51.htm | 27939 | 2017-05-04 17:27:03 |
| R52.htm | 46062 | 2017-05-04 17:27:03 |
| R53.htm | 39796 | 2017-05-04 17:27:03 |
| R54.htm | 15252 | 2017-05-04 17:27:03 |
| R55.htm | 52355 | 2017-05-04 17:27:03 |
| R56.htm | 27182 | 2017-05-04 17:27:03 |
| R57.htm | 27446 | 2017-05-04 17:27:03 |
| R58.htm | 18511 | 2017-05-04 17:27:03 |
| R59.htm | 10646 | 2017-05-04 17:27:03 |
| R6.htm | 73584 | 2017-05-04 17:27:03 |
| R60.htm | 14252 | 2017-05-04 17:27:03 |
| R61.htm | 15928 | 2017-05-04 17:27:03 |
| R62.htm | 6289 | 2017-05-04 17:27:03 |
| R63.htm | 20625 | 2017-05-04 17:27:03 |
| R64.htm | 10707 | 2017-05-04 17:27:03 |
| R7.htm | 12349 | 2017-05-04 17:27:03 |
| R8.htm | 155349 | 2017-05-04 17:27:03 |
| R9.htm | 9590 | 2017-05-04 17:27:03 |
| report.css | 2767 | 2017-05-04 17:27:03 |
| Show.js | 1410 | 2017-05-04 17:27:03 |