Note 8 - Taxes on Income (Tax Benefits) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 500,000
Undistributed Earnings of Foreign Subsidiaries	277,000,000
Deferred Tax Assets, Operating Loss Carryforwards	19,355,000	17,146,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration		10,500,000
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration		8,900,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
Deferred Tax Assets, Operating Loss Carryforwards, Foreign		1,500,000
Deferred Tax Assets, Tax Credit Carryforwards	500,000
Deferred Tax Assets, Valuation Allowance	19,353,000	7,797,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	300,000	300,000	600,000
Expiration of Statute of Limitations [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 200,000