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Legal (Details) - USD ($)
Oct. 17, 2017
Sep. 30, 2017
Walnut Street Possible Litigation [Member]    
Loss Contingencies [Line Items]    
Loss Contingency, Estimate of Possible Loss   $ 8,000,000
Subsequent Event [Member] | Order For Restitution (“Restitution Order”) and Order to Pay Civil Money Penalty (“CMP Order”) [Member]    
Loss Contingencies [Line Items]    
Loss Contingency, Damages Sought, Value $ 2,576,000  
Loss Contingency Accrual, Provision $ 2,500,000