Collaborative Arrangements - Merck KGaA (Details) - Merck KGaA $ in Millions |
1 Months Ended | 12 Months Ended | |
|---|---|---|---|
|
Jan. 31, 2017
developmentProgram
clinical-stage_program
|
Dec. 31, 2018
USD ($)
|
Dec. 31, 2017
USD ($)
|
|
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||
| Right to license, number of development programs | developmentProgram | 4 | ||
| Right to license, number of clinical stage programs | clinical-stage_program | 2 | ||
| Number of pre-clinical stage programs | developmentProgram | 2 | ||
| Collaborative arrangement development and regulatory potential milestone payments maximum | $ | $ 230.0 | ||
| Up-front payment | $ | $ 65.0 | ||