Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets			$ 630	$ 202
Estimated amortization expense for the remainder of 2018	$ 600		600
Estimated amortization expense for 2019	1,200		1,200
Estimated amortization expense for 2020	1,200		1,200
Estimated amortization expense for 2021	1,200		1,200
Estimated amortization expense for 2022	1,200		1,200
Cost of revenue
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	93	$ 60	186	60
Selling, general and administrative
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 200	$ 142	$ 400	$ 142