Note 14 - Taxes on Income - Provision for Income Taxes (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current, Federal taxes
Current, State taxes		2	3	2
Current	[1]	368	264	1,081
Deferred	[2]	(462)	327	(756)
		(94)	591	325
		$ (92)	$ 594	$ 327

[1] Includes for 2014 (i) income in the amount of $858 due to reversal of income tax contingency reserves that were determined to be no longer needed due to finalization of a tax assessment of one of the Company’s subsidiaries and (ii) income in the amount of $1,234 due to removal of valuation allowance of tax advances.

[2] Includes for 2014 income tax benefit in the amount of $827 due to elimination of valuation allowance of deferred tax assets.