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Note N - Convertible Notes Payable (Details Textual) - USD ($) |  |  |  |  |  |  | 3 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 12, 2020 | May 06, 2020 | Jul. 10, 2019 | Jul. 01, 2019 | Jun. 14, 2019 | Apr. 04, 2019 | Jun. 30, 2019 | Mar. 31, 2020 | Mar. 30, 2020 | Mar. 25, 2020 | Mar. 12, 2020 | Dec. 31, 2019 | Nov. 11, 2015
Stock Issued During Period, Shares, Commitment Fees (in shares) |  |  |  |  | 200,000 | 80,000 | 130,000 |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 3.60
Payments of Stock Issuance Costs, Commitment Fees |  |  | $ 50,000 |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Issued for Due Diligence Fee (in shares) |  |  | 266,667 |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, Issued for Due Diligence Fee |  |  | $ 400,000 |  |  |  |  |  |  |  |  |  |
Payments of Stock Issuance Costs, Banker Fees |  |  | 193,500 |  |  |  |  |  |  |  |  |  |
Payments of Stock Issuance Costs, Legal Fees |  |  | 71,330 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Recorded as Debt Discount |  |  | $ 595,662 |  |  |  |  |  |  |  |  |  |
Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  |  |  |  |  |  |  |  | 500,000 |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  |  |  | $ 1.50 |  |  |  |
Conversion of Senior Secured Convertible Note to Common Stock [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock, Amount Converted | $ 3,250,000 |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock, Shares Issued (in shares) | 4,999,995 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  |  | $ 0.65 |  |  |  |  |
Investor Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Term (Year) |  |  | 5 years |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  | 2,000,000 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 1.50 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Rights, Maximum Percentage of Securities Called by Warrants or Rights |  |  | 20.00% |  |  |  |  |  |  |  |  |  |
Senior Secured Convertible Note [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  | $ 2,100,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Fee Amount |  | 133,333 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 2,415,000 |  |  |  |  |  |  |  |  |  |  |
The Note [Member] | Senior Secured Convertible Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) |  |  | $ 1.50 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount, Total |  |  | $ 510,000 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | 3,060,000 |  |  |  |  |  |  |  |  |  |
Proceeds from Debt, Net of Issuance Costs |  |  | 2,550,000 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal due in 180 Days |  |  | 918,000 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal due in 270 Days |  |  | $ 1,071,000 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Percent |  |  | 25.00% |  |  |  |  |  |  |  |  |  |
Amended Note [Member] | Senior Secured Convertible Note [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 0.65 |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  |  |  | $ 3,789,000 |  |
Convertible Debentures [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 550,000 |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) |  |  |  |  |  | $ 1.50 |  |  |  |  |  |  |
Debt Instrument, Discount Percentage |  |  |  |  |  | 7.00% |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount, Total |  |  |  |  |  | $ 40,000 |  |  |  |  |  |  |
Debt Instrument, Number of Additional Borrowings Allowed |  |  |  |  |  | 2 |  |  |  |  |  |  |
Debt Instrument, Additional Borrowings Allowed Amount |  |  |  |  |  | $ 550,000 |  |  |  |  |  |  |
Debt Agreement, Maximum Borrowing Capacity |  |  |  |  |  | 1,020,000 |  |  |  |  |  |  |
Stock Issued During Period, Shares, Commitment Fees (in shares) |  |  |  | 10,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Fee Amount |  |  |  |  |  | 120,000 |  |  |  |  |  |  |
Monthly Commitment Fee |  |  |  |  |  | $ 15,000 |  |  |  |  |  |  |
Convertible Debentures [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Premium Payment Percentage |  |  |  |  |  | 5.00% |  |  |  |  |  |  |
Convertible Debentures [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Premium Payment Percentage |  |  |  |  |  | 25.00% |  |  |  |  |  |  |
Convertible Redeemable Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  | $ 157,000 |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) |  |  |  |  | $ 1.50 |  |  |  |  |  |  |  |
Debt Instrument, Fee Amount |  |  |  |  | $ 30,000 |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 10.00% |  |  |  |  |  |  |  |
Stock Returned to Company, Prepayment of Debt Covenant (in shares) |  |  |  |  | 20,000 |  |  |  |  |  |  |  |
Convertible Redeemable Note [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Premium Payment Percentage |  |  |  |  | 10.00% |  |  |  |  |  |  |  |
Convertible Redeemable Note [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Premium Payment Percentage |  |  |  |  | 30.00% |  |  |  |  |  |  |  |
Convertible Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount, Total |  |  |  |  |  |  |  |  |  |  |  | $ 574,330 |
Debt Issuance Costs, Net, Total |  |  |  |  |  |  | $ 195,000 |  |  |  |  |  |
Legal Fees |  |  |  |  |  |  | $ 17,000 |  |  |  |  |  |

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