Annual report pursuant to Section 13 and 15(d)

Collaborative Arrangements - Merck Platform Technology Transfer and License Agreement (Details)

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Collaborative Arrangements - Merck Platform Technology Transfer and License Agreement (Details) - Merck - Technology Transfer and License Agreement - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Aug. 31, 2015
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Liability, revenue recognized $ 3,100 $ 4,000 $ 4,100  
Contingent receivable       $ 15,000
Maintenance        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Liability, revenue recognized   900    
Research and development revenue        
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]        
Liability, revenue recognized $ 100 $ 900