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Leases - Operating Lease Information (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) ft² term | Dec. 31, 2019 USD ($) ft² | Dec. 31, 2018 USD ($)
Leases [Line Items] |  |  |
Operating lease right-of-use assets recognized in exchange for lease liabilities | $ 2,133 | $ 57,691 | $ 0
Mission Bay Lease |  |  |
Leases [Line Items] |  |  |
Leased space delivered (in sq ft) | ft² | 4,940 | 13,907 |
Operating lease right-of-use assets recognized in exchange for lease liabilities | $ 2,133 | $ 6,698 |
Number of consecutive terms to extend lease | term | 2 |  |
Lease extension term | 5 years |  |
Third Street Lease |  |  |
Leases [Line Items] |  |  |
Leased space delivered (in sq ft) | ft² | 0 | 67,105 |
Operating lease right-of-use assets recognized in exchange for lease liabilities | $ 0 | $ 50,993 |
Number of consecutive terms to extend lease | term | 1 |  |
Lease extension term | 5 years |  |

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- Definition Area of leased space delivered. + References No definition available. + Details
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- Definition Lease extension term. + References No definition available. + Details
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- Definition Leases [Line Items] + References No definition available. + Details
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- Definition Number of consecutive five year terms to extend lease. + References No definition available. + Details
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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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- Details
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- Details
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