Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 316	$ 0
Estimated amortization expense for the remainder of 2018	900
Estimated amortization expense for 2019	1,200
Estimated amortization expense for 2020	1,200
Estimated amortization expense for 2021	1,200
Estimated amortization expense for 2022	1,200
Cost of revenue
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	93
Selling, general and administrative
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 200