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Leases - Additional Information (Details) |  |  |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 31, 2021 | Apr. 13, 2020 | Oct. 15, 2019 USD ($) ft² | Mar. 12, 2019 USD ($) ft² | Dec. 31, 2021 USD ($) ft² | Dec. 31, 2020 USD ($) | Apr. 07, 2020 USD ($) ft² | Jan. 30, 2018 USD ($) ft²
Operating Lease, Payments |  |  |  |  | $ 1,300,000 |  |  |
Operating Lease Impairment Loss |  |  |  |  | 600,000 |  |  |
Operating Lease Residual Value Of Leased Asset |  |  |  |  | 1,400,000 |  |  |
Other Asset Impairment Charges |  |  |  |  | $ 100,000 |  |  |
Discounted Risk-adjusted Rate |  |  |  |  | 10.00% |  |  |
Operating lease expiration month and year |  | 2027-02 | 2027-02 |  |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  |  | $ 4,420,000 | $ 4,650,000 |  |
Operating Lease, Liability |  |  |  |  | 5,247,000 |  |  |
Recognition in exchange of Operating Lease Liabilities |  |  |  |  | 1,400,000 |  |  |
Boston, MA |  |  |  |  |  |  |  |
Security Deposit |  |  |  |  | $ 100,000 | $ 100,000 |  |
Sublease term amendment |  |  |  |  | Aug. 31, 2026 |  |  |
Operating lease expiration month and year | 2026-08 |  |  |  | 2016-08 |  |  |
Houston, TX |  |  |  |  |  |  |  |
Operating Lease Monthly Rental Payment |  |  |  | $ 2,000 |  |  |  |
Operating lease expiration month and year |  |  |  | 2021-04 |  |  |  |
Operating Leases Future Minimum Monthly Payment Due Through Year 2021 |  |  | $ 17,000 |  | $ 37,000,000 |  | $ 12,000,000 | $ 1,000
Operating Lease Area | ft² |  |  | 8,443 | 1,038 | 32,148 |  | 5,594 | 210
Annual base rent increase |  | 3.00% | 3.00% |  | 3.00% |  |  |

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- Definition Amount of loss from impairment of right-of-use asset from operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 25 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123399704&loc=SL77918431-209957 + Details
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