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Note 2 - Cash, Cash Equivalents and Restricted Cash (Details Textual) - USD ($)
Apr. 16, 2019
Jun. 30, 2019
Dec. 31, 2018
Amended Credit Agreement [Member]      
Restricted Cash And Cash Equivalents Items [Line Items]      
Long-term restricted cash   $ 11,000,000 $ 3,000,000
MIR Bidco, SA [Member] | Flexographic Packaging Segment [Member]      
Restricted Cash And Cash Equivalents Items [Line Items]      
Remaining prepayment balance   13,000,000  
Cash collateral for guaranty   15,000,000  
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] | 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