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Leases - Additional Information (Details) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Nov. 30, 2017 | Jun. 30, 2017 | Dec. 31, 2020 USD ($) Lease | Nov. 30, 2019 USD ($)
Lessee Lease Description [Line Items] |  |  |  |  |
Number of operating leases | Lease |  |  |  | 4 |
Lessee, operating lease, existence of option to terminate |  |  |  | false |
Implicit interest rate |  |  |  | 0.00% |
Office and Laboratory Space | Montreal, Quebec |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |
Operating lease, term of contract |  | 3 years | 4 years |  | 5 years
Operating lease, expiration month and year |  | 2020-10 | 2021-07 |  |
Operating lease, existence of option to extend |  | true |  |  |
Operating lease, option to extend, description |  | extended through October 2022 |  |  |
Prepaid rent |  |  |  |  | $ 1,000
Operating Lease, renewal term |  |  |  |  | 5 years
Office and Laboratory Space | Cambridge, Massachusetts |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |
Operating lease, term of contract | 2 years |  |  |  |
Operating lease, expiration month and year | 2021-05 |  |  |  |
Standby Letters of Credit | Office and Laboratory Space | Montreal, Quebec |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |
Line of credit facility, unused amount |  |  |  | $ 212 |

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- Definition Indicates (true false) whether lessee has option to extend operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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