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Commitments and Contingencies - Additional Information (Detail) $ in Thousands | 1 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2014 milestone_payment | Mar. 31, 2021 USD ($) | Jan. 01, 2021 | Dec. 31, 2020 USD ($) | Jan. 01, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |
Lease extension term period |  |  | 8 years 2 months |  |
Operating lease, right-of-use asset increase amount |  |  |  |  | $ 13,000
Operating leases right-of-use assets |  | $ 18,289 |  | $ 15,228 |
Less operating lease liability, current portion |  | 3,126 |  | 2,033 |
Operating lease liability, less current portion |  | $ 18,462 |  | $ 16,069 |
Number of milestone payments | milestone_payment | 6 |  |  |  |

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- Definition Term of lessee's operating lease renewal, 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=121609121&loc=SL77918673-209980 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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