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Collaboration Revenue (Details Textual 1)
Dec. 31, 2020
Research Collaboration And Exclusive License Agreement [Member] | Collaboration Partner Janssen [Member] | ASC 606 [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Remaining research period 21 months