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Note 9 - Notes Payable and Capital Leases - Long-term Debt (Details)
$ in Millions
Dec. 31, 2020
USD ($)
Dec. 31, 2020
MXN ($)
Dec. 31, 2019
USD ($)
Total long-term debt $ 5,037,435   $ 1,058,486
Less current portion (50,137,435)  
Total Long-term debt, net of current portion   1,058,486
4% Subordinated Notes [Member]      
Long-term debt 1,123,769   1,058,486
Notes Payable to Banks [Member] | Flexo Universal [Member]      
Long-term debt 1,756,771 $ 35
Term Loan [Member] | PNC [Member]      
Long-term debt $ 2,156,895