Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Government institutions	$ 167	$ 191
Prepaid expenses	155	342
Advances to vendors	371	634
Other assets		458
Prepaid expenses and other current assets	$ 693	$ 1,625