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Summary Of Significant Accounting Policies - Success Payments, Research Funding Payments and Notes Payables (Details) - Promissory Notes	12 Months Ended
	Dec. 31, 2020
Recent Accounting Pronouncements
Interest rate (as a percentage)	4.80%
Period of outstanding principal and accrued interest payable	5 months

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- Definition

Period after which outstanding principal and interest becomes payable under the debt instrument.

+ References

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X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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