Quarterly report [Sections 13 or 15(d)]

Note 2 - Revenue (Details Textual)

v3.25.3
Note 2 - Revenue (Details Textual)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
Sep. 30, 2024
Sep. 30, 2025
USD ($)
Sep. 30, 2024
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Revenue from Contract with Customers, Sales Returns, Percent     1.00% 1.00%    
Contract with Customer, Liability $ 4.5   $ 4.5   $ 4.9  
Increase (Decrease) in Contract with Customer, Liability     $ 4.5      
Contract with Customer, Liability, Revenue Recognized         $ 4.9 $ 4.4
Geographic Concentration Risk [Member] | Revenue Benchmark [Member]            
Number of Major Markets     0 0    
Number of Major Customers 0 0 0 0    
Minimum [Member]            
Revenue from Contract with Customer, Sales Returns Policy Term (Day)     14 days      
Revenue from Contract with Customers, Historical Sales Returns, Percent     1.00%      
Maximum [Member]            
Revenue from Contract with Customer, Sales Returns Policy Term (Day)     1 year      
Revenue from Contract with Customers, Historical Sales Returns, Percent     7.00%