Summary of Significant Accounting Policies - Schedule of Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Indemnification assets	$ 875	$ 875
Prepaid assets	941	1,230
Other	72	65
Total other current assets	$ 1,888	$ 2,170