Quarterly report pursuant to Section 13 or 15(d)

Contingencies and commitments - MD Anderson Strategic Alliance (Details)

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Contingencies and commitments - MD Anderson Strategic Alliance (Details) - MD Anderson Strategic Alliance - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2022
Sep. 26, 2016
Contingencies and commitments            
Milestone Payment, Accrued but Not Yet Paid         $ 2,326,000  
Upfront payment       $ 3,412,000    
Milestone Payments $ 454,000 $ 3,549,000 $ 2,326,000      
Minimum            
Contingencies and commitments            
Potential milestone payments           $ 19,644,000