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+ Details

Royalty and other revenue - Additional Information (Detail) - Royalty and other revenue - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
License And Royalty Revenue [Line Items]
Revenue	$ 488		$ 10,859	$ 5,845	$ 13,587
Juno Therapeutics
License And Royalty Revenue [Line Items]
Revenue		$ 2,500