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Investments (Details)
$ in Millions
Sep. 16, 2015
USD ($)
Fair Value, Inputs, Level 1 | Kingstone Shanghai  
Schedule of Equity Method Investments [Line Items]  
Equity method investment, fair value $ 2.7
Kingstone | Kingstone Holding Company  
Schedule of Equity Method Investments [Line Items]  
Ownership percentage 15.00%
Kingstone | Shanghai Operating Entity  
Schedule of Equity Method Investments [Line Items]  
Ownership percentage 10.00%