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Note 2 - Cash, Cash Equivalents and Restricted Cash (Details Textual) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Cash Collateralized Letter of Credit Facility [Member]    
Restricted Cash And Cash Equivalents Items [Line Items]    
Restricted cash $ 45 $ 45
Brazil [Member]    
Restricted Cash And Cash Equivalents Items [Line Items]    
Restricted cash 5 3
China [Member] | Lucky HuaGuang Graphics Co Ltd [Member]    
Restricted Cash And Cash Equivalents Items [Line Items]    
Escrow deposit $ 5 $ 4