Subsequent Event (Details) - Chief Executive Officer - Subsequent Event $ in Thousands	Feb. 02, 2018 USD ($)
Subsequent Event [Line Items]
Separation Agreement, lump sum cash payment	$ 3,350
Separation Agreement, additional cash payments	$ 1,650
Separation Agreement, payout period	18 months

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