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v3.20.1

Note 4 - Debt (Details Textual) |  |  |  |  | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 11, 2019 USD ($) shares | Oct. 08, 2018 USD ($) | Jun. 08, 2018 | Dec. 14, 2017 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Interest Expense, Total |  |  |  |  | $ 464,546 | $ 462,855 |  | $ 1,493,264 | $ 1,560,130 |  |
PNC [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative Liability, Notional Amount |  |  |  | $ 3,000,000 |  |  |  |  |  |  |
Derivative, Term of Contract (Year) |  |  |  | 3 years |  |  |  |  |  |  |
Derivative, Fixed Interest Rate |  |  |  | 2.25% |  |  |  |  |  |  |
Promissory Note [Member] | John H Schwan [Member] |  |  |  |  |  |  |  |  |  |  |
Due to Related Parties, Total |  |  |  |  |  |  |  |  |  |  | $ 1,099,000
Interest Payable |  |  |  |  |  |  |  |  |  |  | 400,000
Debt Conversion, Original Debt, Amount | $ 600,000 |  |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares | 181,000 |  |  |  |  |  |  |  |  |  |
Repayments of Related Party Debt |  |  |  |  |  |  |  |  |  | $ 0 |
Interest Expense, Total |  |  |  |  | $ 15,000 |  |  | $ 45,000 |  |  |
PNC [Member] | PNC Agreements [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Temporary Over-Advance |  |  |  |  |  |  | $ 1,200,000 |  |  |  |
Debt Instrument, Temporary Over-Advance, End Balance |  |  |  |  |  |  | $ 0 |  |  |  |
Debt Instrument, Temporary Over-Advance, Term (Week) |  |  |  |  |  |  | 42 days |  |  |  |
Debt instrument, Amendment Fee |  |  |  |  |  |  | $ 250,000 |  |  |  |
Debt Instrument, Interest Rate, Increase (Decrease) |  |  | 2.00% |  |  |  |  |  |  |  |
PNC [Member] | PNC Agreements [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Fixed Charge Coverage Ratio |  |  | 1.1 |  |  |  |  |  |  |  |
PNC [Member] | PNC Agreements [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  | 18,000,000
PNC [Member] | PNC Agreements [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  |  |  |  |  |  |  |  | $ 6,000,000
PNC [Member] | PNC Agreements, Amendment Two [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Funding Proceeds Used to Repay Term Loan |  | $ 2,000,000 |  |  |  |  |  |  | $ 5,000,000 |  |
Debt Instrument, Covenant, Required Proceeds from Equity Issuance |  | 7,500,000 |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity, Total |  | $ 0 |  |  |  |  |  |  |  |  |

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