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Commitments and Contingencies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2020 USD ($) ft²
Commitments And Contingencies [Line Items]
Base rent payable	$ 17,079,000
Estimated termination costs and other fees	2,800,000
Non-cancellable purchase commitments	$ 22,600,000
Minimum [Member]
Commitments And Contingencies [Line Items]
Operating lease, term of contract	2 years
Payment of royalty fees	3.00%
Maximum [Member]
Commitments And Contingencies [Line Items]
Operating lease, term of contract	7 years
Future milestone payments	$ 15,000,000.0
Payment of royalty fees	6.00%
Watertown, Massachusetts [Member]
Commitments And Contingencies [Line Items]
Operating lease, term of contract	85 months
Area of operating lease | ft²	9,704
Initial monthly lease payments per month	$ 60,000.00
Base rent payable	$ 5,400,000
Lease commencement date	Jun. 02, 2020

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- Definition

Commitments and contingencies.

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- Definition

Estimated termination costs and other fees.

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- Definition

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- Definition

Lease commencement date.

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- Definition

Monthly lease payment.

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- Definition

Operating lease area.

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- Definition

Amount of lessee's undiscounted obligation for lease payments for operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980

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- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

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- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

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