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Warrants - Additional Information (Details) - USD ($) | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Class of Warrant or Right [Line Items] |  |  |  |  |
Fair value adjustment of warrants |  | $ 12,562,000 | $ 164,000 | $ 256,000 | $ 143,000
2017 Warrant |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Percentage of debt instrument | 10.00% |  |  | 10.00% |
Percentage of equity securities | 70.00% |  |  | 70.00% |
2018 Warrant |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Percentage of warrant amount exercisable | 10.00% |  |  | 10.00% |
2020 Warrants | Series A Convertible Preferred shares [Member] |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Percentage of additional issued | 10.00% |  |  |  |

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- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 25 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109262497&loc=d3e20148-110875 + Details
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