Note 14 - Taxes on Income (Details Textual) ₪ in Thousands		12 Months Ended							24 Months Ended
		Dec. 31, 2022 USD ($)	Dec. 31, 2022 ILS (₪)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 ILS (₪)
Tax Cuts and Jobs Act of 2017, Transition Tax, Income Tax Expense (Benefit)								$ 16,053,000
Income Tax Expense (Benefit), Total		$ 18,075,000		$ 5,292,000	$ 4,900,000
Deferred Tax Assets, Net, Total	[1]	8,599,000		15,850,000					$ 8,599,000
Deferred Tax Assets, Valuation Allowance		43,873,000		19,288,000					43,873,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		1,633,000,000		$ 1,610,000					1,633,000,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total		$ 0							0
Maximum [Member] | Technological Preferred Enterprise [Member]
Taxable Income Subject to Lower Tax Rate | ₪			₪ 10,000,000
Foreign Tax Authority [Member] | Revenue Commissioners, Ireland [Member]
Effective Income Tax Rate Reconciliation, Percent, Total		12.50%	12.50%
Operating Loss Carryforwards		$ 49,611,000							49,611,000
Foreign Tax Authority [Member] | Revenue Commissioners, Ireland [Member] | Interest Income [Member]
Effective Income Tax Rate Reconciliation, Percent, Total		25.00%	25.00%
Foreign Tax Authority [Member] | Israel Tax Authority [Member]
Income Tax Rate, Foreign Ownership Exceeds 90%		10.00%	10.00%
Income Tax Rate, Foreign Ownership Exceeds 49%		20.00%	20.00%
Income Tax Expense (Benefit), Total		$ 0
Undistributed Earnings of Foreign Subsidiaries		33,677							33,677	₪ 118,512
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries		$ 0							0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		23.00%	23.00%
Open Tax Year		2018 2019 2020	2018 2019 2020
Deferred Tax Assets, Valuation Allowance		$ 31,494,000							31,494,000
Operating Loss Carryforwards		$ 16,284,000							$ 16,284,000
Foreign Tax Authority [Member] | Israel Tax Authority [Member] | Dividends Paid to Foreign Companies [Member]
Effective Income Tax Rate Reconciliation, Percent, Total		4.00%	4.00%
Foreign Tax Authority [Member] | Israel Tax Authority [Member] | Intellectual Property [Member]
Effective Income Tax Rate Reconciliation, Percent, Total		12.00%	12.00%
Foreign Tax Authority [Member] | Israel Tax Authority [Member] | Intellectual Property [Member] | Development Area A [Member]
Effective Income Tax Rate Reconciliation, Percent, Total		7.50%	7.50%
Foreign Tax Authority [Member] | Israel Tax Authority [Member] | Minimum [Member]
Tax Exemption Period (Year)		2 years	2 years
Foreign Tax Authority [Member] | Israel Tax Authority [Member] | Maximum [Member]
Effective Income Tax Rate Reconciliation, Percent, Total		23.00%	23.00%
Tax Exemption Period (Year)		10 years	10 years
Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member]
Effective Income Tax Rate Reconciliation, Percent, Total									10.00%
Effective Income Tax Rate Reconciliation, Taxable Profit Up to 500,000 Euros, Percent						28.00%	28.00%
Effective Income Tax Rate Reconciliation, Taxable Profit Above 500,000 Euros, Percent						31.00%	33.33%
Effective Income Tax Rate Reconciliation, Specific Revenues Under the French Ip Box Regime									10.00%
Effective Income Tax Rate Reconciliation, Plus Social Surtax, Percent, Total									10.30%
Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member] | Tax Year 2020 [Member]
Effective Income Tax Rate Reconciliation, Percent, Total					28.00%
Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member] | Tax Year 2021 [Member]
Effective Income Tax Rate Reconciliation, Percent, Total				26.50%
Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member] | Tax Year 2022 [Member]
Effective Income Tax Rate Reconciliation, Percent, Total				25.00%
Domestic Tax Authority [Member]
Deferred Tax Assets, Net, Total		$ 4,544,000		$ 119,000					$ 4,544,000
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Deferred Tax Liabilities, Net, Total		0							0
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]
Operating Loss Carryforwards		$ 27,300,000							$ 27,300,000
Net Operating Loss Carryforwards Begins to Expire				2030

[1] $45 and $119 net deferred taxes for the years ended December 31, 2020 and 2021, respectively, are from domestic jurisdictions.