Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Legal Proceedings) (Details)

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Commitments and Contingencies (Legal Proceedings) (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Loss Contingencies [Line Items]    
Litigation settlement amount $ 1,450,000  
Settled Litigation [Member]    
Loss Contingencies [Line Items]    
Litigation settlement amount   $ 500,000
Litigation settlement date   Nov. 28, 2016
Litigation settlement accrual   $ 500,000