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| 0001558370-22-004154-index.html | 2022-03-23 16:18:01 | |
| 0001558370-22-004154.txt | 2022-03-23 16:18:01 | |
 0001558370-22-004154-xbrl.zip | 365795 | 2022-03-23 16:18:01 |
| erkh-20211231.xsd | 67504 | 2022-03-23 16:18:01 |
| erkh-20211231x10k.htm | 3499432 | 2022-03-23 16:18:01 |
| erkh-20211231x10k_htm.xml | 3651231 | 2022-03-23 16:18:01 |
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| erkh-20211231xex23.htm | 4233 | 2022-03-23 16:18:01 |
| erkh-20211231xex31d1.htm | 10135 | 2022-03-23 16:18:01 |
| erkh-20211231xex31d2.htm | 10488 | 2022-03-23 16:18:01 |
| erkh-20211231xex32.htm | 7989 | 2022-03-23 16:18:01 |
| erkh-20211231_cal.xml | 98182 | 2022-03-23 16:18:01 |
| erkh-20211231_def.xml | 213909 | 2022-03-23 16:18:01 |
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| Financial_Report.xlsx | 127548 | 2022-03-23 16:18:01 |
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| R1.htm | 65613 | 2022-03-23 16:18:01 |
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| report.css | 2768 | 2022-03-23 16:18:01 |
| Show.js | 1086 | 2022-03-23 16:18:01 |