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Commitments and Contingencies - Leases Narrative (Details) ft² in Thousands, $ in Thousands | Jul. 12, 2021 | Aug. 28, 2020 USD ($) | Sep. 30, 2021 USD ($) ft² | Jul. 13, 2021 USD ($) ft² | Dec. 31, 2020 USD ($) | Sep. 20, 2018 ft²
--- | --- | --- | --- | --- | --- | ---
Commitments and Contingencies |  |  |  |  |  |
Tenant improvements |  | $ 12,149 |  |  |  |
Operating lease right-of-use assets |  |  | $ 15,588 |  | $ 15,614 |
Heights Union |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |
Area of lease property | ft² |  |  | 75,000 |  |  | 75,000
Operating lease, lessor allowance |  | $ 5,250 |  |  |  |
Operating lease, incremental borrowing rate |  | 10.60% |  |  |  |
Operating lease right-of-use assets |  | $ 13,323 |  |  |  |
Operating Lease, Liability |  | $ 18,573 |  |  |  |
Number of months of free rent pursuant to lease amendment | 1 month 15 days |  |  |  |  |
Corporate Headquarters Facility |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |
Area of lease property | ft² |  |  |  | 19,000 |  |
Operating lease right-of-use assets |  |  |  | $ 1,303 |  |
Operating Lease, Liability |  |  |  | $ 1,303 |  |

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + 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 Carrying amount as of the balance sheet date of improvements having a life longer than one year that were made for the benefit of one or more tenants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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