Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000721748-17-000648-index-headers.html | 2017-09-15 17:14:09 | |
| 0000721748-17-000648-index.html | 2017-09-15 17:14:09 | |
| 0000721748-17-000648.txt | 2017-09-15 17:14:09 | |
 0000721748-17-000648-xbrl.zip | 111129 | 2017-09-15 17:14:09 |
| FilingSummary.xml | 29684 | 2017-09-15 17:14:09 |
| Financial_Report.xlsx | 67493 | 2017-09-15 17:14:09 |
| grst-20170630.xml | 1301583 | 2017-09-15 17:14:09 |
| grst-20170630.xsd | 47423 | 2017-09-15 17:14:09 |
| grst-20170630_cal.xml | 62949 | 2017-09-15 17:14:09 |
| grst-20170630_def.xml | 94172 | 2017-09-15 17:14:09 |
| grst-20170630_lab.xml | 245132 | 2017-09-15 17:14:09 |
| grst-20170630_pre.xml | 206810 | 2017-09-15 17:14:09 |
| grst10q080817ex31_1.htm | 10612 | 2017-09-15 17:14:09 |
| grst10q080817ex31_2.htm | 10625 | 2017-09-15 17:14:09 |
| grst10q080817ex32_1.htm | 4684 | 2017-09-15 17:14:09 |
| grst10q080817ex32_2.htm | 4625 | 2017-09-15 17:14:09 |
| grst10q090117.htm | 678090 | 2017-09-15 17:14:09 |
 img001_v1.jpg | 6444 | 2017-09-15 17:14:09 |
| R1.htm | 28768 | 2017-09-15 17:14:09 |
| R10.htm | 20420 | 2017-09-15 17:14:09 |
| R11.htm | 14036 | 2017-09-15 17:14:09 |
| R12.htm | 8297 | 2017-09-15 17:14:09 |
| R13.htm | 62959 | 2017-09-15 17:14:09 |
| R14.htm | 6675 | 2017-09-15 17:14:09 |
| R15.htm | 20204 | 2017-09-15 17:14:09 |
| R16.htm | 5900 | 2017-09-15 17:14:09 |
| R17.htm | 7368 | 2017-09-15 17:14:09 |
| R18.htm | 49605 | 2017-09-15 17:14:09 |
| R19.htm | 16396 | 2017-09-15 17:14:09 |
| R2.htm | 84525 | 2017-09-15 17:14:09 |
| R20.htm | 11263 | 2017-09-15 17:14:09 |
| R21.htm | 48367 | 2017-09-15 17:14:09 |
| R22.htm | 69399 | 2017-09-15 17:14:09 |
| R23.htm | 84868 | 2017-09-15 17:14:09 |
| R24.htm | 116106 | 2017-09-15 17:14:09 |
| R25.htm | 7840 | 2017-09-15 17:14:09 |
| R26.htm | 5313 | 2017-09-15 17:14:09 |
| R27.htm | 8175 | 2017-09-15 17:14:09 |
| R28.htm | 64740 | 2017-09-15 17:14:09 |
| R29.htm | 14928 | 2017-09-15 17:14:09 |
| R3.htm | 21190 | 2017-09-15 17:14:09 |
| R30.htm | 18100 | 2017-09-15 17:14:09 |
| R31.htm | 12301 | 2017-09-15 17:14:09 |
| R32.htm | 61325 | 2017-09-15 17:14:09 |
| R33.htm | 19052 | 2017-09-15 17:14:09 |
| R34.htm | 40912 | 2017-09-15 17:14:09 |
| R35.htm | 15359 | 2017-09-15 17:14:09 |
| R36.htm | 40225 | 2017-09-15 17:14:09 |
| R37.htm | 64180 | 2017-09-15 17:14:09 |
| R38.htm | 115677 | 2017-09-15 17:14:09 |
| R39.htm | 17995 | 2017-09-15 17:14:09 |
| R4.htm | 81622 | 2017-09-15 17:14:09 |
| R40.htm | 24863 | 2017-09-15 17:14:09 |
| R41.htm | 17601 | 2017-09-15 17:14:09 |
| R42.htm | 69227 | 2017-09-15 17:14:09 |
| R43.htm | 9812 | 2017-09-15 17:14:09 |
| R44.htm | 14158 | 2017-09-15 17:14:09 |
| R45.htm | 15536 | 2017-09-15 17:14:09 |
| R46.htm | 6654 | 2017-09-15 17:14:09 |
| R47.htm | 7679 | 2017-09-15 17:14:09 |
| R48.htm | 8382 | 2017-09-15 17:14:09 |
| R49.htm | 19406 | 2017-09-15 17:14:09 |
| R5.htm | 26176 | 2017-09-15 17:14:09 |
| R50.htm | 17749 | 2017-09-15 17:14:09 |
| R51.htm | 39178 | 2017-09-15 17:14:09 |
| R6.htm | 95147 | 2017-09-15 17:14:09 |
| R7.htm | 15364 | 2017-09-15 17:14:09 |
| R8.htm | 50109 | 2017-09-15 17:14:09 |
| R9.htm | 15788 | 2017-09-15 17:14:09 |
| report.css | 2767 | 2017-09-15 17:14:09 |
| Show.js | 1410 | 2017-09-15 17:14:09 |