Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Provision (benefit) from income tax	$ 7	$ (42)	$ 21	$ (340)
Effective income tax rate	(0.20%)	1.20%	(0.30%)	4.20%