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Fair Value Measurement (Details Textual) - Discount Rate
Sep. 30, 2019
Minimum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair value inputs, discount rate 5.80%
Maximum  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair value inputs, discount rate 12.50%