Licensing and Other Arrangements - Affimed (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Licensing and other arrangements
Revenue from contracts with customers	$ 525	$ 53	$ 544	$ 553
Affimed
Licensing and other arrangements
Contract assets	0		0
Contract liabilities	0		0
Capitalized contract costs	0		0
Revenue from contracts with customers	$ 0		$ 0