Subsequent Event (Details) - Subsequent Event - Mr. John Schaefer shares in Thousands, $ in Thousands	Mar. 18, 2018 USD ($) shares
Subsequent Event [Line Items]
Aggregate amount subject to tax withholdings and other deductions \| $	$ 1,459
Period for payment	18 months
Number of unvested shares subject to accelerated vesting \| shares	242

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