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Note 9 - Notes Payable and Capital Leases (Details Textual) $ in Millions |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 30, 2020 USD ($) | May 15, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2020 MXN ($)
Potential Percent Increase in Interest Rates Contingent on Covenant Compliance |  |  |  | 4.00% |  |
Long-Term Debt, Maturity, Year One |  |  |  | $ 4,284,391 |  |
Debt Issuance Costs, Net, Total |  |  |  | 143,105 |  |
Long-Term Debt, Maturity, Year Two |  |  |  | 344,734 |  |
Long-Term Debt, Maturity, Year Three |  |  |  | 551,414 |  |
Other Income, Paycheck Protection Program Grant |  |  |  | 1,047,700 |  |
Deferred Other Income Liability |  |  |  | 0 |  |
Notes Payable to Banks [Member] | Flexo Universal [Member] |  |  |  |  |  |
Long-term Debt, Total |  |  |  | $ 1,756,771 |  | $ 35
Debt Instrument, Term (Year) |  |  |  | 3 years |  |
Long-Term Debt, Maturity, Year One |  |  |  | $ 846,000 |  |
Notes Payable to Banks [Member] | Flexo Universal [Member] | Interbank Equilibrium Interest Rate [Member] |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 4.50% |  |
Paycheck Protection Program CARES Act [Member] |  |  |  |  |  |
Proceeds from Issuance of Debt | $ 1,047,700 |  |  |  |  |
PNC [Member] | Term Loan [Member] |  |  |  |  |  |
Long-term Debt, Total |  |  |  | $ 2,156,895 |  |
PNC [Member] | PNC Agreements [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | 5,300,000 |  |
Line of Credit Facility, Temporary Over-advance |  | $ 0 | $ 1,200,000 |  |  |
Line of Credit Facility, Temporary Over-advance, Fee |  |  | $ 250,000 |  |  |
PNC [Member] | PNC Agreements [Member] | Term Loan [Member] |  |  |  |  |  |
Long-term Debt, Total |  |  |  | 2,300,000 |  |
Debt Instrument, Periodic Payment, Total |  |  |  | $ 100,000 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 8.25% |  | 8.25%

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