Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid insurance	$ 311	$ 321
Prepaid maintenance contracts	164	84
Prepaid software licenses	120	214
Other prepaid expenses	104	125
Due from vendors	10	0
Prepaid network costs	6	162
Prepaid taxes	0	72
Prepaid expenses and other current assets	$ 715	$ 978