Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-21-043980-index-headers.html | 2021-08-12 16:13:48 | |
| 0001564590-21-043980-index.html | 2021-08-12 16:13:48 | |
| 0001564590-21-043980.txt | 2021-08-12 16:13:48 | |
 0001564590-21-043980-xbrl.zip | 341767 | 2021-08-12 16:13:48 |
| FilingSummary.xml | 35364 | 2021-08-12 16:13:48 |
| Financial_Report.xlsx | 81981 | 2021-08-12 16:13:48 |
| grph-10q_20210630.htm | 3986901 | 2021-08-12 16:13:48 |
| grph-10q_20210630_htm.xml | 1363544 | 2021-08-12 16:13:48 |
| grph-20210630.xsd | 65669 | 2021-08-12 16:13:48 |
| grph-20210630_cal.xml | 32948 | 2021-08-12 16:13:48 |
| grph-20210630_def.xml | 252115 | 2021-08-12 16:13:48 |
| grph-20210630_lab.xml | 473299 | 2021-08-12 16:13:48 |
| grph-20210630_pre.xml | 382953 | 2021-08-12 16:13:48 |
| grph-ex311_9.htm | 20789 | 2021-08-12 16:13:48 |
| grph-ex312_8.htm | 20844 | 2021-08-12 16:13:48 |
| grph-ex321_7.htm | 9503 | 2021-08-12 16:13:48 |
| grph-ex322_6.htm | 9558 | 2021-08-12 16:13:48 |
| MetaLinks.json | 595323 | 2021-08-12 16:13:48 |
| R1.htm | 55629 | 2021-08-12 16:13:48 |
| R10.htm | 94301 | 2021-08-12 16:13:48 |
| R11.htm | 32348 | 2021-08-12 16:13:48 |
| R12.htm | 27016 | 2021-08-12 16:13:48 |
| R13.htm | 17436 | 2021-08-12 16:13:48 |
| R14.htm | 11860 | 2021-08-12 16:13:48 |
| R15.htm | 11901 | 2021-08-12 16:13:48 |
| R16.htm | 36605 | 2021-08-12 16:13:48 |
| R17.htm | 207328 | 2021-08-12 16:13:48 |
| R18.htm | 109825 | 2021-08-12 16:13:48 |
| R19.htm | 12028 | 2021-08-12 16:13:48 |
| R2.htm | 69464 | 2021-08-12 16:13:48 |
| R20.htm | 5907 | 2021-08-12 16:13:48 |
| R21.htm | 26859 | 2021-08-12 16:13:48 |
| R22.htm | 92510 | 2021-08-12 16:13:48 |
| R23.htm | 31174 | 2021-08-12 16:13:48 |
| R24.htm | 26648 | 2021-08-12 16:13:48 |
| R25.htm | 26591 | 2021-08-12 16:13:48 |
| R26.htm | 206010 | 2021-08-12 16:13:48 |
| R27.htm | 111289 | 2021-08-12 16:13:48 |
| R28.htm | 48896 | 2021-08-12 16:13:48 |
| R29.htm | 23718 | 2021-08-12 16:13:48 |
| R3.htm | 33758 | 2021-08-12 16:13:48 |
| R30.htm | 15840 | 2021-08-12 16:13:48 |
| R31.htm | 4493 | 2021-08-12 16:13:48 |
| R32.htm | 16617 | 2021-08-12 16:13:48 |
| R33.htm | 10648 | 2021-08-12 16:13:48 |
| R34.htm | 16836 | 2021-08-12 16:13:48 |
| R35.htm | 5084 | 2021-08-12 16:13:48 |
| R36.htm | 12865 | 2021-08-12 16:13:48 |
| R37.htm | 106981 | 2021-08-12 16:13:48 |
| R38.htm | 24361 | 2021-08-12 16:13:48 |
| R39.htm | 61542 | 2021-08-12 16:13:48 |
| R4.htm | 28455 | 2021-08-12 16:13:48 |
| R40.htm | 63308 | 2021-08-12 16:13:48 |
| R41.htm | 13011 | 2021-08-12 16:13:48 |
| R42.htm | 82960 | 2021-08-12 16:13:48 |
| R43.htm | 14203 | 2021-08-12 16:13:48 |
| R44.htm | 13420 | 2021-08-12 16:13:48 |
| R45.htm | 25898 | 2021-08-12 16:13:48 |
| R46.htm | 46817 | 2021-08-12 16:13:48 |
| R47.htm | 12922 | 2021-08-12 16:13:48 |
| R48.htm | 10695 | 2021-08-12 16:13:48 |
| R49.htm | 22143 | 2021-08-12 16:13:48 |
| R5.htm | 101582 | 2021-08-12 16:13:48 |
| R50.htm | 16228 | 2021-08-12 16:13:48 |
| R51.htm | 33481 | 2021-08-12 16:13:48 |
| R52.htm | 14599 | 2021-08-12 16:13:48 |
| R6.htm | 5837 | 2021-08-12 16:13:48 |
| R7.htm | 82702 | 2021-08-12 16:13:48 |
| R8.htm | 18874 | 2021-08-12 16:13:48 |
| R9.htm | 18569 | 2021-08-12 16:13:48 |
| report.css | 2767 | 2021-08-12 16:13:48 |
| Show.js | 1085 | 2021-08-12 16:13:48 |