Note 7 - Taxes on Income (Details) - Unrecognized Tax Benefits (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Tax Contingency [Line Items]
Reductions due to lapse of statute of limitations	$ (38,000)	$ (65,000)
Excluding Interest and Penalties [Member]
Income Tax Contingency [Line Items]
Balance at January 1,	497,000	565,000
Additions based on tax positions related to the current year	59,000	59,000
(Reductions) additions for tax positions of prior years	(7,000)	1,000
Reductions due to audits by taxing jurisdictions		(50,000)
Reductions due to lapse of statute of limitations	(87,000)	(78,000)
Balance at December 31,	$ 462,000	$ 497,000