Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-21-153642-index-headers.html | 2021-05-06 19:41:34 | |
| 0001193125-21-153642-index.html | 2021-05-06 19:41:34 | |
| 0001193125-21-153642.txt | 2021-05-06 19:41:34 | |
 0001193125-21-153642-xbrl.zip | 31986 | 2021-05-06 19:41:34 |
| d154631d497.htm | 5097 | 2021-05-06 19:41:34 |
| FilingSummary.xml | 3438 | 2021-05-06 19:41:34 |
| Financial_Report.xlsx | 9947 | 2021-05-06 19:41:34 |
 g154631g58a33.jpg | 4760 | 2021-05-06 19:41:34 |
| ist1-20210422.xml | 19345 | 2021-05-06 19:41:34 |
| ist1-20210422.xsd | 7078 | 2021-05-06 19:41:34 |
| ist1-20210422_def.xml | 217965 | 2021-05-06 19:41:34 |
| ist1-20210422_lab.xml | 138001 | 2021-05-06 19:41:34 |
| ist1-20210422_pre.xml | 165744 | 2021-05-06 19:41:34 |
| R1.htm | 18244 | 2021-05-06 19:41:34 |
| R2.htm | 9653 | 2021-05-06 19:41:34 |
| R3.htm | 22461 | 2021-05-06 19:41:34 |
| R4.htm | 3936 | 2021-05-06 19:41:34 |
| report.css | 2767 | 2021-05-06 19:41:34 |
| Show.js | 1085 | 2021-05-06 19:41:34 |