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Note 2 - Cash, Cash Equivalents and Restricted Cash (Details Textual) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
CHINA | Lucky Hua Guang Graphics Co Ltd [Member]    
Restricted Cash and Investments, Noncurrent $ 5 $ 5
BRAZIL    
Restricted Cash and Investments, Noncurrent 6 6
UNITED KINGDOM    
Restricted Cash and Investments, Noncurrent 5 5
Cash Collateralized Letter Of Credit Facility [Member]    
Restricted Cash and Investments, Noncurrent $ 43 $ 44