Subsequent Events (Details) - Sydney Office - Subsequent Event ft² in Thousands, $ in Millions	Feb. 29, 2020 USD ($) ft²
Subsequent Event [Line Items]
Area of leased space (in sq ft) \| ft²	25
Lease not yet commenced, estimated base rent payments \| $	$ 3.4

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration