Note 8 - Taxes on Income (Tax Benefits) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%
Deferred Tax Assets, Operating Loss Carryforwards	$ 17,225,000	$ 14,366,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	7,800,000
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	9,400,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	88,000	483,000
Deferred Tax Assets, Foreign Credit Carryforwards, Not Subject to Expiration	100,000
Deferred Tax Assets, Valuation Allowance	6,574,000	4,691,000	4,700,000
Undistributed Profits of Non-US Subsidiaries Considered Permanently Reinvested	261,300,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	1,000,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	600,000		100,000	200,000
Expiration of Statutes of Limitation [Member]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 400,000