Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001558370-18-009290-index-headers.html | 2018-11-13 17:14:23 | |
| 0001558370-18-009290-index.html | 2018-11-13 17:14:23 | |
| 0001558370-18-009290.txt | 2018-11-13 17:14:23 | |
 0001558370-18-009290-xbrl.zip | 151356 | 2018-11-13 17:14:23 |
| FilingSummary.xml | 32306 | 2018-11-13 17:14:23 |
| Financial_Report.xlsx | 80255 | 2018-11-13 17:14:23 |
| mrsn-20180930.xml | 1624461 | 2018-11-13 17:14:23 |
| mrsn-20180930.xsd | 65079 | 2018-11-13 17:14:23 |
| mrsn-20180930ex311d9cf54.htm | 11342 | 2018-11-13 17:14:23 |
| mrsn-20180930ex312ffe10c.htm | 13056 | 2018-11-13 17:14:23 |
| mrsn-20180930ex3214238b5.htm | 16011 | 2018-11-13 17:14:23 |
| mrsn-20180930x10q.htm | 1421621 | 2018-11-13 17:14:23 |
| mrsn-20180930_cal.xml | 42333 | 2018-11-13 17:14:23 |
| mrsn-20180930_def.xml | 242321 | 2018-11-13 17:14:23 |
| mrsn-20180930_lab.xml | 476596 | 2018-11-13 17:14:23 |
| mrsn-20180930_pre.xml | 366231 | 2018-11-13 17:14:23 |
| R1.htm | 22225 | 2018-11-13 17:14:23 |
| R10.htm | 80993 | 2018-11-13 17:14:23 |
| R11.htm | 25862 | 2018-11-13 17:14:23 |
| R12.htm | 80101 | 2018-11-13 17:14:23 |
| R13.htm | 101800 | 2018-11-13 17:14:23 |
| R14.htm | 8450 | 2018-11-13 17:14:23 |
| R15.htm | 5360 | 2018-11-13 17:14:23 |
| R16.htm | 145857 | 2018-11-13 17:14:23 |
| R17.htm | 61884 | 2018-11-13 17:14:23 |
| R18.htm | 121097 | 2018-11-13 17:14:23 |
| R19.htm | 114604 | 2018-11-13 17:14:23 |
| R2.htm | 68395 | 2018-11-13 17:14:23 |
| R20.htm | 77626 | 2018-11-13 17:14:23 |
| R21.htm | 25497 | 2018-11-13 17:14:23 |
| R22.htm | 82763 | 2018-11-13 17:14:23 |
| R23.htm | 96699 | 2018-11-13 17:14:23 |
| R24.htm | 21432 | 2018-11-13 17:14:23 |
| R25.htm | 10363 | 2018-11-13 17:14:23 |
| R26.htm | 22884 | 2018-11-13 17:14:23 |
| R27.htm | 14182 | 2018-11-13 17:14:23 |
| R28.htm | 11828 | 2018-11-13 17:14:23 |
| R29.htm | 10604 | 2018-11-13 17:14:23 |
| R3.htm | 18995 | 2018-11-13 17:14:23 |
| R30.htm | 4722 | 2018-11-13 17:14:23 |
| R31.htm | 38456 | 2018-11-13 17:14:23 |
| R32.htm | 60194 | 2018-11-13 17:14:23 |
| R33.htm | 8957 | 2018-11-13 17:14:23 |
| R34.htm | 37531 | 2018-11-13 17:14:23 |
| R35.htm | 78663 | 2018-11-13 17:14:23 |
| R36.htm | 27254 | 2018-11-13 17:14:23 |
| R37.htm | 64412 | 2018-11-13 17:14:23 |
| R38.htm | 12818 | 2018-11-13 17:14:23 |
| R39.htm | 21214 | 2018-11-13 17:14:23 |
| R4.htm | 38680 | 2018-11-13 17:14:23 |
| R40.htm | 31306 | 2018-11-13 17:14:23 |
| R41.htm | 28597 | 2018-11-13 17:14:23 |
| R42.htm | 14234 | 2018-11-13 17:14:23 |
| R43.htm | 23264 | 2018-11-13 17:14:23 |
| R44.htm | 27785 | 2018-11-13 17:14:23 |
| R45.htm | 8432 | 2018-11-13 17:14:23 |
| R46.htm | 10162 | 2018-11-13 17:14:23 |
| R47.htm | 25028 | 2018-11-13 17:14:23 |
| R48.htm | 43058 | 2018-11-13 17:14:23 |
| R49.htm | 10304 | 2018-11-13 17:14:23 |
| R5.htm | 71057 | 2018-11-13 17:14:23 |
| R50.htm | 10398 | 2018-11-13 17:14:23 |
| R51.htm | 5963 | 2018-11-13 17:14:23 |
| R52.htm | 10693 | 2018-11-13 17:14:23 |
| R53.htm | 11135 | 2018-11-13 17:14:23 |
| R6.htm | 15971 | 2018-11-13 17:14:23 |
| R7.htm | 103122 | 2018-11-13 17:14:23 |
| R8.htm | 161736 | 2018-11-13 17:14:23 |
| R9.htm | 113771 | 2018-11-13 17:14:23 |
| report.css | 2767 | 2018-11-13 17:14:23 |
| Show.js | 1085 | 2018-11-13 17:14:23 |