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|---|---|---|
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| 0000721748-17-000259-index.html | 2017-04-17 17:27:06 | |
| 0000721748-17-000259.txt | 2017-04-17 17:27:06 | |
 0000721748-17-000259-xbrl.zip | 96976 | 2017-04-17 17:27:06 |
| FilingSummary.xml | 22260 | 2017-04-17 17:27:06 |
| Financial_Report.xlsx | 59907 | 2017-04-17 17:27:06 |
| grst-20161231.xml | 659296 | 2017-04-17 17:27:06 |
| grst-20161231.xsd | 31114 | 2017-04-17 17:27:06 |
| grst-20161231_cal.xml | 53230 | 2017-04-17 17:27:06 |
| grst-20161231_def.xml | 66920 | 2017-04-17 17:27:06 |
| grst-20161231_lab.xml | 205767 | 2017-04-17 17:27:06 |
| grst-20161231_pre.xml | 166298 | 2017-04-17 17:27:06 |
| grst10k040917.htm | 759418 | 2017-04-17 17:27:06 |
| grst10k040917ex31_1.htm | 10735 | 2017-04-17 17:27:06 |
| grst10k040917ex31_2.htm | 11023 | 2017-04-17 17:27:06 |
| grst10k040917ex32_1.htm | 3876 | 2017-04-17 17:27:06 |
| grst10k040917ex32_2.htm | 4106 | 2017-04-17 17:27:06 |
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| R9.htm | 8591 | 2017-04-17 17:27:06 |
| report.css | 2767 | 2017-04-17 17:27:06 |
| Show.js | 1410 | 2017-04-17 17:27:06 |