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Commitments and Contingencies - (Narratives) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Sep. 30, 2017
Loss Contingencies |  |  |
Rent expense | $ 500,000 | $ 900,000 | $ 600,000
Catapult Limited |  |  |
Loss Contingencies |  |  |
Rent free period (in months) | 6 months |  |
Whitewood Media Village GP Limited and Whitewood Media Village Nominee Limited |  |  |
Loss Contingencies |  |  |
Leasehold improvements | $ 6,600,000 | 2,500,000 |
The Mutual Insurance Society Limited |  |  |
Loss Contingencies |  |  |
Lease term (in years) | 15 years |  |
Sucampo Pharmaceuticals, Inc. |  |  |
Loss Contingencies |  |  |
Rent free period (in months) | 4 months |  |
Operating lease |  |  |
Loss Contingencies |  |  |
Leasehold improvements |  | 100,000 | 2,100,000
Operating lease | Imperial (Forest House) Limited |  |  |
Loss Contingencies |  |  |
Lease term (in years) | 10 years |  |
Period to exercise option for additional space (in months) | 15 months |  |
Licensing agreements |  |  |
Loss Contingencies |  |  |
Loss Contingency Accrual | $ 600,000 | $ 0 | $ 0

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