Subsequent Events (Details) - Subsequent Events $ in Millions	Oct. 15, 2018 USD ($) ft²
Subsequent Events
Sub-leased portion \| ft²	14,817
Amount of base rent from sub-lease	$ 1.8
Additional amount of operating expenses from sub-lease	$ 0.5

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