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| 0001590714-21-000041.txt | 2021-04-29 16:15:58 | |
 0001590714-21-000041-xbrl.zip | 452897 | 2021-04-29 16:15:58 |
| esi-20210331.htm | 1212355 | 2021-04-29 16:15:58 |
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| esi-20210331_lab.xml | 488848 | 2021-04-29 16:15:58 |
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| esi10-q2021331exx321.htm | 10756 | 2021-04-29 16:15:58 |
| FilingSummary.xml | 31740 | 2021-04-29 16:15:58 |
| Financial_Report.xlsx | 64862 | 2021-04-29 16:15:58 |
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| report.css | 2767 | 2021-04-29 16:15:58 |
| Show.js | 1085 | 2021-04-29 16:15:58 |