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v3.19.3.a.u2

Commitments and Contingencies - (Narratives) (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2018 | Sep. 30, 2017 | Dec. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2019 unit | Jan. 31, 2019 | Jan. 01, 2019 USD ($)
Loss Contingencies |  |  |  |  |  |  |  |  |
Operating lease assets |  |  |  | $ 23,409 |  |  |  |  | $ 5,600
Minimum lease payments for leases signed but not yet commenced |  |  |  | $ 57,900 |  |  |  |  |
Rent expense |  |  | $ 500 |  | $ 900 | $ 600 |  |  |
Imperial (Forest House) Limited | Building |  |  |  |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |  |  |  |
Lease term (in years) |  |  |  | 10 years |  |  |  |  |
Imperial (Forest House) Limited | Additional Space |  |  |  |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |  |  |  |
Lease term (in years) |  |  |  | 15 months |  |  |  |  |
Catapult Manufacturing Center | Building |  |  |  |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |  |  |  |
Rent free period (in months) |  | 6 months |  |  |  |  |  |  |
Laboratory Space In White City, London | Building |  |  |  |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |  |  |  |
Lease term (in years) |  |  |  |  | 10 years |  |  |  |
Operating lease assets |  |  |  | $ 8,200 |  |  |  |  |
Manufacturing Space In Enfield, United Kingdom | Building |  |  |  |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |  |  |  |
Lease term (in years) |  |  |  |  | 15 years |  |  |  |
Leasehold Improvements |  |  |  | 4,100 |  |  |  |  |
Number of units (units) | unit |  |  |  |  |  |  | 3 |  |
Office Space In Rockville, Maryland | Building |  |  |  |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |  |  |  |
Operating lease rent free period | 4 months |  |  |  |  |  |  |  |
Office And Manufacturing Space in Rockville, Maryland | Building |  |  |  |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |  |  |  |
Lease term (in years) |  |  |  |  |  |  |  | 16 years |
Leasehold Improvements |  |  |  | 2,200 |  |  |  |  |
Minimum lease payments for leases signed but not yet commenced |  |  |  | 57,900 |  |  |  |  |
Software license |  |  |  |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |  |  |  |
Loss contingency accrual |  |  |  | $ 700 |  |  |  |  |

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