- DefinitionThe number of positions to be eliminated in connection with a restructuring plan, as a percentage of total current positions.
| Name: |
mrsn_RestructuringAndRelatedCostNumberOfPositionsToBeEliminatedPercent |
| Namespace Prefix: |
mrsn_ |
| Data Type: |
xbrli:pureItemType |
| Balance Type: |
na |
| Period Type: |
instant |