Additional milestone payment.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Contract with customer liability milestone method revenue recognized.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Non-refundable upfront payments received.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Revenue recognition expected period.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Revenue recognition milestone method expected milestone receivable.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
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+ 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

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+ Details

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Period Type:	duration

- Details

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- Details

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- Details

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- Details

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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, 2021	Feb. 28, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Revenue from collaboration agreement			$ 154,344,000	$ 98,382,000	$ 85,071,000
Revenue recognized	$ 75,700,000		(95,789,000)
Development Revenue
Disaggregation Of Revenue [Line Items]
Revenue from collaboration agreement			75,448,000	56,943,000	41,552,000
MRD Development Agreements
Disaggregation Of Revenue [Line Items]
Revenue from collaboration agreement			3,200,000
Milestone revenue recognized			10,000,000.0	2,500,000	2,000,000.0
Revenue recognized			11,800,000	3,400,000	3,700,000
MRD Development Agreements \| Maximum
Disaggregation Of Revenue [Line Items]
Additional milestone payment receivable	333,500,000		333,500,000
MRD Development Agreements \| Development Revenue
Disaggregation Of Revenue [Line Items]
Revenue from collaboration agreement			300,000
Genentech Collaboration Agreement
Disaggregation Of Revenue [Line Items]
Revenue from collaboration agreement			62,000,000.0	$ 52,800,000	$ 35,100,000
Non-refundable upfront payments received		$ 300,000,000.0	$ 300,000,000.0
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