Note 1 - Significant Accounting Policies and Related Matters (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jan. 01, 2023 USD ($)
Number of Operating Segments	1
Accounts Receivable, after Allowance for Credit Loss				$ 22,000
Accounts Receivable, after Allowance for Credit Loss, Current	$ 30,063	$ 25,064
Marketable Security, Unrealized Gain (Loss)	1,000	1,200
Goodwill, Impairment Loss	0	0	$ 0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	$ 0	$ 0
ITALY
Accounts Receivable, after Allowance for Credit Loss, Current	1,100
SPAIN
Accounts Receivable, after Allowance for Credit Loss, Current	900
FRANCE
Accounts Receivable, after Allowance for Credit Loss, Current	1,800
Geographic Distribution, Foreign [Member]
Cash, Ending Balance	$ 10,900
Minimum [Member]
Period of Payments Received from Customers (Day)	30 days
Finite-Lived Intangible Asset, Useful Life	2 years
Maximum [Member]
Period of Payments Received from Customers (Day)	60 days
Finite-Lived Intangible Asset, Useful Life	16 years