Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Revenue (Details Textual)

v3.22.1
Note 2 - Revenue (Details Textual)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
Dec. 31, 2021
Revenue from Contract with Customers, Sales Returns, Percent 1.00%   1.00%
Increase (Decrease) in Contract with Customer, Liability $ (3.0)    
Contract with Customer, Liability, Revenue Recognized $ (3.4)    
Geographic Concentration Risk [Member] | Revenue Benchmark [Member]      
Number of Major Markets 0 0  
Number of Major Customers 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 8.00%