Income Taxes - Schedule of Income Taxes on Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 0	$ (92)	$ 92
State	169	191	109
Foreign	1,498	2,516	930
Total current income tax	1,667	2,615	1,131
Deferred:
Foreign	(1,254)	172	182
Total deferred income tax	(1,254)	172	182
Income tax expense	$ 413	$ 2,787	$ 1,313