Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001558370-18-005541-index-headers.html | 2018-07-10 09:20:57 | |
| 0001558370-18-005541-index.html | 2018-07-10 09:20:57 | |
| 0001558370-18-005541.txt | 2018-07-10 09:20:57 | |
 0001558370-18-005541-xbrl.zip | 148549 | 2018-07-10 09:20:57 |
| FilingSummary.xml | 25242 | 2018-07-10 09:20:57 |
| Financial_Report.xlsx | 62352 | 2018-07-10 09:20:57 |
| grif-20180531.xml | 2109276 | 2018-07-10 09:20:57 |
| grif-20180531.xsd | 48210 | 2018-07-10 09:20:57 |
| grif-20180531ex10622d665.htm | 68308 | 2018-07-10 09:20:57 |
| grif-20180531ex10637af04.htm | 270613 | 2018-07-10 09:20:57 |
| grif-20180531ex106452824.htm | 1249919 | 2018-07-10 09:20:57 |
| grif-20180531ex311f60c84.htm | 13498 | 2018-07-10 09:20:57 |
| grif-20180531ex312acd020.htm | 13481 | 2018-07-10 09:20:57 |
| grif-20180531ex321b15edb.htm | 7636 | 2018-07-10 09:20:57 |
| grif-20180531ex3227c8227.htm | 8009 | 2018-07-10 09:20:57 |
| grif-20180531x10q.htm | 2001159 | 2018-07-10 09:20:57 |
| grif-20180531_cal.xml | 68783 | 2018-07-10 09:20:57 |
| grif-20180531_def.xml | 181803 | 2018-07-10 09:20:57 |
| grif-20180531_lab.xml | 495501 | 2018-07-10 09:20:57 |
| grif-20180531_pre.xml | 329996 | 2018-07-10 09:20:57 |
 grif20180531ex10637af04001.jpg | 87874 | 2018-07-10 09:20:57 |
 grif20180531ex106452824001.jpg | 87874 | 2018-07-10 09:20:57 |
| R1.htm | 22223 | 2018-07-10 09:20:57 |
| R10.htm | 118068 | 2018-07-10 09:20:57 |
| R11.htm | 91953 | 2018-07-10 09:20:57 |
| R12.htm | 55591 | 2018-07-10 09:20:57 |
| R13.htm | 6090 | 2018-07-10 09:20:57 |
| R14.htm | 482241 | 2018-07-10 09:20:57 |
| R15.htm | 119397 | 2018-07-10 09:20:57 |
| R16.htm | 12172 | 2018-07-10 09:20:57 |
| R17.htm | 6247 | 2018-07-10 09:20:57 |
| R18.htm | 30513 | 2018-07-10 09:20:57 |
| R19.htm | 115174 | 2018-07-10 09:20:57 |
| R2.htm | 55386 | 2018-07-10 09:20:57 |
| R20.htm | 90593 | 2018-07-10 09:20:57 |
| R21.htm | 51257 | 2018-07-10 09:20:57 |
| R22.htm | 488897 | 2018-07-10 09:20:57 |
| R23.htm | 114410 | 2018-07-10 09:20:57 |
| R24.htm | 16285 | 2018-07-10 09:20:57 |
| R25.htm | 18143 | 2018-07-10 09:20:57 |
| R26.htm | 23237 | 2018-07-10 09:20:57 |
| R27.htm | 79116 | 2018-07-10 09:20:57 |
| R28.htm | 114035 | 2018-07-10 09:20:57 |
| R29.htm | 21272 | 2018-07-10 09:20:57 |
| R3.htm | 12912 | 2018-07-10 09:20:57 |
| R30.htm | 15847 | 2018-07-10 09:20:57 |
| R31.htm | 10420 | 2018-07-10 09:20:57 |
| R32.htm | 89050 | 2018-07-10 09:20:57 |
| R33.htm | 29281 | 2018-07-10 09:20:57 |
| R34.htm | 27972 | 2018-07-10 09:20:57 |
| R35.htm | 17795 | 2018-07-10 09:20:57 |
| R36.htm | 42193 | 2018-07-10 09:20:57 |
| R37.htm | 4003 | 2018-07-10 09:20:57 |
| R38.htm | 35965 | 2018-07-10 09:20:57 |
| R39.htm | 34946 | 2018-07-10 09:20:57 |
| R4.htm | 42977 | 2018-07-10 09:20:57 |
| R40.htm | 34977 | 2018-07-10 09:20:57 |
| R41.htm | 30690 | 2018-07-10 09:20:57 |
| R5.htm | 20501 | 2018-07-10 09:20:57 |
| R6.htm | 34917 | 2018-07-10 09:20:57 |
| R7.htm | 4346 | 2018-07-10 09:20:57 |
| R8.htm | 67832 | 2018-07-10 09:20:57 |
| R9.htm | 22148 | 2018-07-10 09:20:57 |
| report.css | 2767 | 2018-07-10 09:20:57 |
| Show.js | 1410 | 2018-07-10 09:20:57 |