Goodwill and Intangible Assets - Schedule of Future Estimated Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	[1]
Future Estimated Amortization of Intangible Assets [Abstract]
Remaining three months of 2019	$ 375
Year ending December 31, 2020	95
Intangible assets, net	$ 470	$ 1,938

[1] Derived from the Company’s audited consolidated financial statements as of December 31, 2018.