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| 0001564590-16-021971-index.html | 2016-08-02 07:31:30 | |
| 0001564590-16-021971.txt | 2016-08-02 07:31:30 | |
 0001564590-16-021971-xbrl.zip | 78575 | 2016-08-02 07:31:30 |
| FilingSummary.xml | 29124 | 2016-08-02 07:31:30 |
| Financial_Report.xlsx | 47351 | 2016-08-02 07:31:30 |
| ghm-10q_20160630.htm | 1065118 | 2016-08-02 07:31:30 |
| ghm-20160630.xml | 897194 | 2016-08-02 07:31:30 |
| ghm-20160630.xsd | 36284 | 2016-08-02 07:31:30 |
| ghm-20160630_cal.xml | 52171 | 2016-08-02 07:31:30 |
| ghm-20160630_def.xml | 71832 | 2016-08-02 07:31:30 |
| ghm-20160630_lab.xml | 264582 | 2016-08-02 07:31:30 |
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| ghm-ex311_8.htm | 16083 | 2016-08-02 07:31:30 |
| ghm-ex312_7.htm | 16174 | 2016-08-02 07:31:30 |
| ghm-ex321_6.htm | 7927 | 2016-08-02 07:31:30 |
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| report.css | 2767 | 2016-08-02 07:31:30 |
| Show.js | 1410 | 2016-08-02 07:31:30 |