Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-16-017216-index-headers.html | 2016-04-29 17:31:45 | |
| 0001564590-16-017216-index.html | 2016-04-29 17:31:45 | |
| 0001564590-16-017216.txt | 2016-04-29 17:31:45 | |
 0001564590-16-017216-xbrl.zip | 146388 | 2016-04-29 17:31:45 |
| extr-10q_20160331.htm | 2727534 | 2016-04-29 17:31:45 |
| extr-20160331.xml | 2527466 | 2016-04-29 17:31:45 |
| extr-20160331.xsd | 47317 | 2016-04-29 17:31:45 |
| extr-20160331_cal.xml | 55287 | 2016-04-29 17:31:45 |
| extr-20160331_def.xml | 138823 | 2016-04-29 17:31:45 |
| extr-20160331_lab.xml | 399857 | 2016-04-29 17:31:45 |
| extr-20160331_pre.xml | 314493 | 2016-04-29 17:31:45 |
| extr-ex101_524.htm | 45261 | 2016-04-29 17:31:45 |
| extr-ex102_525.htm | 78626 | 2016-04-29 17:31:45 |
| extr-ex103_430.htm | 11411 | 2016-04-29 17:31:45 |
| extr-ex311_6.htm | 18916 | 2016-04-29 17:31:45 |
| extr-ex312_8.htm | 19105 | 2016-04-29 17:31:45 |
| extr-ex321_9.htm | 7253 | 2016-04-29 17:31:45 |
| extr-ex322_10.htm | 7149 | 2016-04-29 17:31:45 |
| FilingSummary.xml | 40516 | 2016-04-29 17:31:45 |
| Financial_Report.xlsx | 71307 | 2016-04-29 17:31:45 |
 gpg5pqbmglij000001.jpg | 3674 | 2016-04-29 17:31:45 |
| R1.htm | 21945 | 2016-04-29 17:31:45 |
| R10.htm | 464468 | 2016-04-29 17:31:45 |
| R11.htm | 80409 | 2016-04-29 17:31:45 |
| R12.htm | 264329 | 2016-04-29 17:31:45 |
| R13.htm | 138562 | 2016-04-29 17:31:45 |
| R14.htm | 20638 | 2016-04-29 17:31:45 |
| R15.htm | 12484 | 2016-04-29 17:31:45 |
| R16.htm | 52686 | 2016-04-29 17:31:45 |
| R17.htm | 11748 | 2016-04-29 17:31:45 |
| R18.htm | 85453 | 2016-04-29 17:31:45 |
| R19.htm | 32788 | 2016-04-29 17:31:45 |
| R2.htm | 82442 | 2016-04-29 17:31:45 |
| R20.htm | 474258 | 2016-04-29 17:31:45 |
| R21.htm | 71321 | 2016-04-29 17:31:45 |
| R22.htm | 267293 | 2016-04-29 17:31:45 |
| R23.htm | 131612 | 2016-04-29 17:31:45 |
| R24.htm | 52806 | 2016-04-29 17:31:45 |
| R25.htm | 83896 | 2016-04-29 17:31:45 |
| R26.htm | 13244 | 2016-04-29 17:31:45 |
| R27.htm | 43376 | 2016-04-29 17:31:45 |
| R28.htm | 10065 | 2016-04-29 17:31:45 |
| R29.htm | 18777 | 2016-04-29 17:31:45 |
| R3.htm | 22275 | 2016-04-29 17:31:45 |
| R30.htm | 32460 | 2016-04-29 17:31:45 |
| R31.htm | 10314 | 2016-04-29 17:31:45 |
| R32.htm | 12802 | 2016-04-29 17:31:45 |
| R33.htm | 17588 | 2016-04-29 17:31:45 |
| R34.htm | 20770 | 2016-04-29 17:31:45 |
| R35.htm | 10854 | 2016-04-29 17:31:45 |
| R36.htm | 14166 | 2016-04-29 17:31:45 |
| R37.htm | 10754 | 2016-04-29 17:31:45 |
| R38.htm | 15903 | 2016-04-29 17:31:45 |
| R39.htm | 13040 | 2016-04-29 17:31:45 |
| R4.htm | 71592 | 2016-04-29 17:31:45 |
| R40.htm | 4318 | 2016-04-29 17:31:45 |
| R41.htm | 13586 | 2016-04-29 17:31:45 |
| R42.htm | 17449 | 2016-04-29 17:31:45 |
| R43.htm | 28295 | 2016-04-29 17:31:45 |
| R44.htm | 49425 | 2016-04-29 17:31:45 |
| R45.htm | 16753 | 2016-04-29 17:31:45 |
| R46.htm | 15505 | 2016-04-29 17:31:45 |
| R47.htm | 35970 | 2016-04-29 17:31:45 |
| R48.htm | 33924 | 2016-04-29 17:31:45 |
| R49.htm | 21966 | 2016-04-29 17:31:45 |
| R5.htm | 21801 | 2016-04-29 17:31:45 |
| R50.htm | 16454 | 2016-04-29 17:31:45 |
| R51.htm | 11002 | 2016-04-29 17:31:45 |
| R52.htm | 12338 | 2016-04-29 17:31:45 |
| R53.htm | 5434 | 2016-04-29 17:31:45 |
| R54.htm | 6288 | 2016-04-29 17:31:45 |
| R55.htm | 16228 | 2016-04-29 17:31:45 |
| R56.htm | 10709 | 2016-04-29 17:31:45 |
| R6.htm | 75063 | 2016-04-29 17:31:45 |
| R7.htm | 12411 | 2016-04-29 17:31:45 |
| R8.htm | 6724 | 2016-04-29 17:31:45 |
| R9.htm | 13575 | 2016-04-29 17:31:45 |
| report.css | 2767 | 2016-04-29 17:31:45 |
| Show.js | 1410 | 2016-04-29 17:31:45 |