Note 1 - Significant Accounting Policies and Related Matters (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Number of Operating Segments	1	1
Accounts Receivable, after Allowance for Credit Loss, Current	$ 25,064	$ 22,040
Marketable Security, Unrealized Gain (Loss)	1,200	1,800
Capitalized Computer Software, Net	3,600
Goodwill, Impairment Loss	0	0	$ 0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0	$ 0
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	3,400	4,200
AOCI, Debt Securities, Available-for-Sale, Adjustment, after Tax	1,200	$ 1,800
ITALY
Accounts Receivable, after Allowance for Credit Loss, Current	1,100
SPAIN
Accounts Receivable, after Allowance for Credit Loss, Current	1,000
FRANCE
Accounts Receivable, after Allowance for Credit Loss, Current	1,200
Geographic Distribution, Foreign [Member]
Cash, Ending Balance	$ 10,000
Minimum [Member]
Period of Payments Received from Customers (Day)	30 days
Finite-Lived Intangible Asset, Useful Life	2 years
Minimum [Member] | Computers and Equipment [Member]
Property, Plant and Equipment, Useful Life	3 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member]
Period of Payments Received from Customers (Day)	60 days
Finite-Lived Intangible Asset, Useful Life	16 years
Maximum [Member] | Computers and Equipment [Member]
Property, Plant and Equipment, Useful Life	5 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, Useful Life	10 years