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Note 2 - Revenue Recognition (Details Textual) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Minimum [Member]      
Contract with Customer, Payment Term (Day) 30 days    
Maximum [Member]      
Contract with Customer, Payment Term (Day) 90 days    
Certain Customers in China [Member]      
Contract with Customer, Payment Term Required Prior to Shipping Products (Week) 14 days    
Certain Customers in China [Member] | Accrued Liabilities, Current [Member]      
Contract with Customer, Liability, Current $ 7.1   $ 6.9
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Product Sales Through Distribution Arrangements [Member]      
Concentration Risk, Percentage 83.00% 90.00%