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Investment (Details) - USD ($)
$ in Millions
Sep. 30, 2016
Sep. 30, 2015
Sep. 16, 2015
Schedule of Equity Method Investments [Line Items]      
Equity method investment, difference between carrying value and underlying net assets $ 2.7    
Kingstone Holding Company      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage   15.00%  
Fair Value, Inputs, Level 2 | 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%