Taxes on Income (Details) - Components of income tax expense (benefit) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal
State and local
Foreign	$ 23	$ 29
Income tax (expense) benefit, current	$ 23	$ 29
Deferred:
Federal
State and local
Income tax (expense) benefit, deferred
Income tax expense	$ 23	$ 29