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Note 12 - Income Taxes (Details Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Mar. 31, 2021
Schedule Of Income Taxes [Line Items]            
U.S. corporate income tax rate 21.00%   21.00% 21.00% 21.00%  
Foreign Tax Authority [Member]            
Schedule Of Income Taxes [Line Items]            
Unrecognized tax benefits, settlements paid   $ 2        
Decrease in net deferred tax assets   $ 2        
Liability for Uncertain Tax Positions, Current           $ 3
Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued           $ 4