Finance Expenses, Net - Summary of Finance Expenses, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Other Income and Expenses [Abstract]
Bank fees and interest	$ 2	$ 1
Change in fair value of derivative warrant liability	(20)	(285)
Financing loss on debt extinguishment		2,364
Exchange rate differences	14	5
Revaluation and interest on convertible loans		237
Financial expenses, net	$ (4)	$ 2,322