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Commitments and Contingencies - Litigation (Details) - USD ($)
12 Months Ended
Oct. 05, 2015
Dec. 31, 2015
Jun. 30, 2016
Commitments and Contingencies      
Damages sought $ 950,000    
Paid legal award   $ 950,000  
Insurance proceeds   $ 187,500  
Loss contingency accrual     $ 0