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Note 9 - Debt - Long-term Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Total long-term debt $ 55  
Current portion (4) $ (4)
Long-term debt, excluding current portion 51 $ 71
Term Loan [Member]    
Total long-term debt 36  
Revolving Credit Facility [Member] | Line of Credit [Member]    
Total long-term debt $ 19