Separation Obligation (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
Sep. 30, 2016	Dec. 31, 2016
Former Chief Operating Officer [Member] \| Separation Agreement Payment [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Amount expensed related to termination		$ 1,644
Non-Plan [Member] \| Employee Stock Option and Restricted Stock [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of unvested shares accelerated	17.00%

Amount of expense recognized from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments), awarded to key employees or individuals. Excludes amount related to plans that cover generally all employees (for example, but not limited to, qualified pension plans).

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration