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Note 10 - Convertible Notes Payable (Details Textual) - USD ($) |  |  | 3 Months Ended
--- | --- | --- | ---
Jun. 14, 2019 | Apr. 04, 2019 | Jun. 30, 2019
Stock Issued During Period, Shares, Commitment Fees | 200,000 | 80,000 | 300,000
Stock to be Issued Monthly, Shares, Payment of Commitment Fees |  | 10,000 |
Stock Returned to Company, Prepayment of Debt Covenant |  |  | 180,000
Adjustments to Additional Paid in Capital, Commitment Fee Adjustment |  |  | $ 270,000
Convertible Debentures [Member] |  |  |
Proceeds from Issuance of Debt |  | $ 550,000 |
Debt Instrument, Convertible, Conversion Price |  | $ 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 |
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 | $ 1.50 |  |
Debt Instrument, Fee Amount | $ 30,000 |  |
Debt Instrument, Interest Rate, Stated Percentage | 10.00% |  |
Stock Returned to Company, Prepayment of Debt Covenant | 180,000 |  |
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 |  |  | 24,533
Debt Instrument, Fee Amount |  |  | 450,000
Debt Issuance Costs, Net, Total |  |  | 180,000
Legal Fees |  |  | $ 17,000

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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