Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-123354-index-headers.html | 2020-04-28 17:16:30 | |
| 0001193125-20-123354-index.html | 2020-04-28 17:16:30 | |
| 0001193125-20-123354.txt | 2020-04-28 17:16:30 | |
 0001193125-20-123354-xbrl.zip | 335849 | 2020-04-28 17:16:30 |
| d919155d10ka.htm | 1321576 | 2020-04-28 17:16:30 |
| d919155d10ka_htm.xml | 8145 | 2020-04-28 17:16:30 |
| d919155dex1023.htm | 162437 | 2020-04-28 17:16:30 |
| d919155dex1024.htm | 16227 | 2020-04-28 17:16:30 |
| d919155dex1025.htm | 160025 | 2020-04-28 17:16:30 |
| d919155dex1026.htm | 16067 | 2020-04-28 17:16:30 |
| d919155dex1028.htm | 15408 | 2020-04-28 17:16:30 |
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| d919155dex314.htm | 3375 | 2020-04-28 17:16:30 |
| FilingSummary.xml | 2102 | 2020-04-28 17:16:30 |
| Financial_Report.xlsx | 7447 | 2020-04-28 17:16:30 |
 g919155dsp16.jpg | 21369 | 2020-04-28 17:16:30 |
 g919155dsp19.jpg | 47171 | 2020-04-28 17:16:30 |
 g919155g0426192651285.jpg | 87633 | 2020-04-28 17:16:30 |
 g919155g0426192651613.jpg | 86462 | 2020-04-28 17:16:30 |
| md-20191231.xsd | 4956 | 2020-04-28 17:16:30 |
| md-20191231_cal.xml | 667 | 2020-04-28 17:16:30 |
| md-20191231_def.xml | 1672 | 2020-04-28 17:16:30 |
| md-20191231_lab.xml | 19199 | 2020-04-28 17:16:30 |
| md-20191231_pre.xml | 15287 | 2020-04-28 17:16:30 |
| MetaLinks.json | 24029 | 2020-04-28 17:16:30 |
| R1.htm | 63720 | 2020-04-28 17:16:30 |
| report.css | 2767 | 2020-04-28 17:16:30 |
| Show.js | 1085 | 2020-04-28 17:16:30 |