Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-22-019862-index-headers.html | 2022-05-12 16:12:29 | |
| 0001564590-22-019862-index.html | 2022-05-12 16:12:29 | |
| 0001564590-22-019862.txt | 2022-05-12 16:12:29 | |
 0001564590-22-019862-xbrl.zip | 275554 | 2022-05-12 16:12:29 |
| FilingSummary.xml | 37092 | 2022-05-12 16:12:29 |
| Financial_Report.xlsx | 86259 | 2022-05-12 16:12:29 |
| grph-10q_20220331.htm | 2688129 | 2022-05-12 16:12:29 |
| grph-10q_20220331_htm.xml | 1318840 | 2022-05-12 16:12:29 |
| grph-20220331.xsd | 66417 | 2022-05-12 16:12:29 |
| grph-20220331_cal.xml | 45723 | 2022-05-12 16:12:29 |
| grph-20220331_def.xml | 231816 | 2022-05-12 16:12:29 |
| grph-20220331_lab.xml | 489052 | 2022-05-12 16:12:29 |
| grph-20220331_pre.xml | 380880 | 2022-05-12 16:12:29 |
| grph-ex311_7.htm | 20786 | 2022-05-12 16:12:29 |
| grph-ex312_9.htm | 20794 | 2022-05-12 16:12:29 |
| grph-ex321_6.htm | 9501 | 2022-05-12 16:12:29 |
| grph-ex322_8.htm | 9510 | 2022-05-12 16:12:29 |
| MetaLinks.json | 666338 | 2022-05-12 16:12:29 |
| R1.htm | 55757 | 2022-05-12 16:12:29 |
| R10.htm | 99757 | 2022-05-12 16:12:29 |
| R11.htm | 37816 | 2022-05-12 16:12:29 |
| R12.htm | 77443 | 2022-05-12 16:12:29 |
| R13.htm | 20469 | 2022-05-12 16:12:29 |
| R14.htm | 11302 | 2022-05-12 16:12:29 |
| R15.htm | 44943 | 2022-05-12 16:12:29 |
| R16.htm | 11501 | 2022-05-12 16:12:29 |
| R17.htm | 37332 | 2022-05-12 16:12:29 |
| R18.htm | 157825 | 2022-05-12 16:12:29 |
| R19.htm | 61767 | 2022-05-12 16:12:29 |
| R2.htm | 97961 | 2022-05-12 16:12:29 |
| R20.htm | 7543 | 2022-05-12 16:12:29 |
| R21.htm | 5549 | 2022-05-12 16:12:29 |
| R22.htm | 38027 | 2022-05-12 16:12:29 |
| R23.htm | 93468 | 2022-05-12 16:12:29 |
| R24.htm | 34423 | 2022-05-12 16:12:29 |
| R25.htm | 79441 | 2022-05-12 16:12:29 |
| R26.htm | 38882 | 2022-05-12 16:12:29 |
| R27.htm | 23039 | 2022-05-12 16:12:29 |
| R28.htm | 154285 | 2022-05-12 16:12:29 |
| R29.htm | 63127 | 2022-05-12 16:12:29 |
| R3.htm | 19651 | 2022-05-12 16:12:29 |
| R30.htm | 38995 | 2022-05-12 16:12:29 |
| R31.htm | 37202 | 2022-05-12 16:12:29 |
| R32.htm | 30525 | 2022-05-12 16:12:29 |
| R33.htm | 13064 | 2022-05-12 16:12:29 |
| R34.htm | 20300 | 2022-05-12 16:12:29 |
| R35.htm | 13326 | 2022-05-12 16:12:29 |
| R36.htm | 21538 | 2022-05-12 16:12:29 |
| R37.htm | 4782 | 2022-05-12 16:12:29 |
| R38.htm | 11236 | 2022-05-12 16:12:29 |
| R39.htm | 131458 | 2022-05-12 16:12:29 |
| R4.htm | 40613 | 2022-05-12 16:12:29 |
| R40.htm | 5774 | 2022-05-12 16:12:29 |
| R41.htm | 61248 | 2022-05-12 16:12:29 |
| R42.htm | 16370 | 2022-05-12 16:12:29 |
| R43.htm | 4657 | 2022-05-12 16:12:29 |
| R44.htm | 55981 | 2022-05-12 16:12:29 |
| R45.htm | 72093 | 2022-05-12 16:12:29 |
| R46.htm | 10924 | 2022-05-12 16:12:29 |
| R47.htm | 96104 | 2022-05-12 16:12:29 |
| R48.htm | 13119 | 2022-05-12 16:12:29 |
| R49.htm | 13139 | 2022-05-12 16:12:29 |
| R5.htm | 50291 | 2022-05-12 16:12:29 |
| R50.htm | 14775 | 2022-05-12 16:12:29 |
| R51.htm | 41134 | 2022-05-12 16:12:29 |
| R52.htm | 11888 | 2022-05-12 16:12:29 |
| R53.htm | 9899 | 2022-05-12 16:12:29 |
| R54.htm | 25200 | 2022-05-12 16:12:29 |
| R55.htm | 14901 | 2022-05-12 16:12:29 |
| R6.htm | 6461 | 2022-05-12 16:12:29 |
| R7.htm | 83910 | 2022-05-12 16:12:29 |
| R8.htm | 19101 | 2022-05-12 16:12:29 |
| R9.htm | 22216 | 2022-05-12 16:12:29 |
| report.css | 2767 | 2022-05-12 16:12:29 |
| Show.js | 1085 | 2022-05-12 16:12:29 |