Annual report pursuant to Section 13 and 15(d)

Note 2 - Revenue (Details Textual)

v3.22.0.1
Note 2 - Revenue (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Revenue from Contract with Customers, Sales Returns, Percent 1.00% 1.00%
Increase (Decrease) in Contract with Customer, Liability $ 6.5  
Contract with Customer, Liability, Revenue Recognized $ 1.0  
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 9.00%