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| 0001558370-22-016330-index.html | 2022-11-04 06:41:31 | |
| 0001558370-22-016330.txt | 2022-11-04 06:41:31 | |
 0001558370-22-016330-xbrl.zip | 19658 | 2022-11-04 06:41:31 |
| FilingSummary.xml | 2212 | 2022-11-04 06:41:31 |
| Financial_Report.xlsx | 6632 | 2022-11-04 06:41:31 |
| imgn-20221104.xsd | 4056 | 2022-11-04 06:41:31 |
| imgn-20221104x8k.htm | 36510 | 2022-11-04 06:41:31 |
| imgn-20221104x8k_htm.xml | 4636 | 2022-11-04 06:41:31 |
| imgn-20221104xex99d1.htm | 200842 | 2022-11-04 06:41:31 |
 imgn-20221104xex99d1001.jpg | 7018 | 2022-11-04 06:41:31 |
| imgn-20221104_def.xml | 3238 | 2022-11-04 06:41:31 |
| imgn-20221104_lab.xml | 634 | 2022-11-04 06:41:31 |
| imgn-20221104_pre.xml | 10104 | 2022-11-04 06:41:31 |
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| R1.htm | 38093 | 2022-11-04 06:41:31 |
| R2.htm | 21138 | 2022-11-04 06:41:31 |
| report.css | 2767 | 2022-11-04 06:41:31 |
| Show.js | 1085 | 2022-11-04 06:41:31 |