Related Party Transactions - AstraZeneca PLC (Details) - Director [Member] - Transactions With AstraZeneca PLC [Member] - USD ($)	3 Months Ended	6 Months Ended
Mar. 31, 2020	Jun. 30, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Revenue from related parties	$ 100,000	$ 100,000
Accounts receivable from related parties			$ 0

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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Name:	us-gaap_AccountsReceivableRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant