Fair Value Measurement - (Details Textual) (Details)	12 Months Ended
	Dec. 31, 2017
Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Risk adjusted discount rate	5.80%
Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Risk adjusted discount rate	10.00%
LS9, Inc
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Risk adjusted discount rate	8.00%