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Note 2 - Cash, Cash Equivalents and Restricted Cash (Details Textual) - USD ($)
9 Months Ended
Apr. 16, 2019
Sep. 30, 2019
Dec. 31, 2018
Amended Credit Agreement [Member]      
Restricted Cash And Cash Equivalents Items [Line Items]      
Long-term restricted cash   $ 14,000,000 $ 3,000,000
Flexographic Packaging Segment [Member]      
Restricted Cash And Cash Equivalents Items [Line Items]      
Prepayment for services and products   15,000,000  
Remaining prepayment balance   8,000,000  
MIR Bidco, SA [Member] | Flexographic Packaging Segment [Member]      
Restricted Cash And Cash Equivalents Items [Line Items]      
Remaining prepayment balance   8,000,000  
Cash collateral for guaranty   10,000,000  
United States [Member] | MIR Bidco, SA [Member] | Flexographic Packaging Segment [Member]      
Restricted Cash And Cash Equivalents Items [Line Items]      
Prepayment for services and products $ 15,000,000    
China [Member] | Lucky HuaGuang Graphics Co Ltd [Member]      
Restricted Cash And Cash Equivalents Items [Line Items]      
Escrow deposit   14,000,000  
China [Member] | MIR Bidco, SA [Member] | Flexographic Packaging Segment [Member]      
Restricted Cash And Cash Equivalents Items [Line Items]      
Guaranty supported by cash collateral $ 15,000,000    
BRAZIL      
Restricted Cash And Cash Equivalents Items [Line Items]      
Long-term restricted cash   $ 4,000,000 $ 5,000,000