Summary of Significant Accounting Policies - Opening and Closing Balances of Company's Contract Liability (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Accounting Policies [Abstract]
Contract liability assumed from EOS		$ 21,196
Payments received		2,586
Revenue recognized	$ (3,400)	(3,390)
Balance at June 30, 2021	$ 20,392	$ 20,392