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Commitments and Contingencies - Additional Information (Details) - USD ($) | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Aug. 14, 2020 | May 02, 2018
Loss Contingencies [Line Items] |  |  |  |  |  |
Lessee, Finance lease expiration month and year | 2023-08 |  | 2023-06 |  |  |
Amortization expense for capital lease | $ 106,000 | $ 13,000 |  |  |  |
Lessee, Operating lease expiration month and year | 2024-09 |  | 2023-06 |  |  |
Operating Leases, Rent expense | $ 4,200,000 | $ 4,500,000 | $ 6,000,000.0 | $ 4,000,000.0 |  |
Purchase obligation | $ 4,000,000 |  | 7,700,000 |  |  | $ 2,600,000
Liabilities subject to compromise early contract termination |  |  |  |  | $ 1,100,000 |
Dispute Settlement [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Commitements and contingencies settlement of disputes payable |  |  | $ 1,500,000 |  |  |

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- Definition Amount of amortization expense attributable to right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 Reference 3: 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 + Details
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