Additional milestone payment.

No definition available.

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- Definition

Agreement termination amount receivable.

+ References

No definition available.

+ Details

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- Definition

Contract with customer liability milestone method revenue recognized.

+ References

No definition available.

+ Details

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- Definition

Eligible payments receivable.

+ References

No definition available.

+ Details

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- Definition

Non-refundable upfront payments received.

+ References

No definition available.

+ Details

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- Definition

Revenue recognition expected period.

+ References

No definition available.

+ Details

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- Definition

Revenue recognition milestone method expected milestone receivable.

+ References

No definition available.

+ Details

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- Definition

Revenue recognized excluding separately negotiated research sequencing contracts.

+ References

No definition available.

+ Details

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- Definition

Term of agreement.

+ References

No definition available.

+ Details

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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

+ Details

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Balance Type:	credit
Period Type:	duration

- 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.

+ References

No definition available.

+ Details

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Details

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Revenue - Additional Information (Details) - USD ($)			1 Months Ended	12 Months Ended
Revenue - Additional Information (Details) - USD ($)	Dec. 31, 2019	Dec. 18, 2015	Feb. 28, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation Of Revenue [Line Items]
Revenue recognized	$ 8,500,000			$ (50,624,000)
Revenue from collaboration agreement				85,071,000	$ 55,663,000	$ 38,448,000
Translational Development Agreements
Disaggregation Of Revenue [Line Items]
Term of agreement		4 years
Agreement termination amount receivable		$ 800,000
Eligible payments receivable		2,300,000
Revenue recognized excluding separately negotiated research sequencing contracts				2,300,000	9,300,000	10,000,000.0
Translational Development Agreements \| Maximum
Disaggregation Of Revenue [Line Items]
Expected revenue through milestone payments		$ 40,000,000.0
MRD Development Agreements
Disaggregation Of Revenue [Line Items]
Milestone revenue recognized				2,000,000.0	10,000,000.0
Revenue recognized				3,700,000	$ 12,800,000	$ 5,100,000
MRD Development Agreements \| Maximum
Disaggregation Of Revenue [Line Items]
Additional milestone payment receivable	220,000,000.0			220,000,000.0
Genentech Collaboration Agreement
Disaggregation Of Revenue [Line Items]
Non-refundable upfront payments received			$ 300,000,000.0	300,000,000.0
Revenue from collaboration agreement				$ 35,100,000
Genentech Collaboration Agreement \| Maximum
Disaggregation Of Revenue [Line Items]
Revenue recognition expected period				8 years
Genentech Collaboration Agreement \| Maximum \| Regulatory Milestones
Disaggregation Of Revenue [Line Items]
Expected revenue through milestone payments	75,000,000.0			$ 75,000,000.0
Genentech Collaboration Agreement \| Maximum \| Development Milestones
Disaggregation Of Revenue [Line Items]
Expected revenue through milestone payments	300,000,000.0			300,000,000.0
Genentech Collaboration Agreement \| Maximum \| Commercial Milestones
Disaggregation Of Revenue [Line Items]
Expected revenue through milestone payments	1,430,000,000.0			1,430,000,000.0
Genentech Collaboration Agreement \| Minimum
Disaggregation Of Revenue [Line Items]
Expected revenue through milestone payments	$ 1,800,000			$ 1,800,000
Revenue recognition expected period				7 years