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Note 11 - Convertible Notes Payable - Convertible Notes Payable (Details) - USD ($) | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Senior Secured Convertible Note [Member] | The Amended and Original Notes [Member] |  |
Convertible notes payable, net | $ 2,061,472 | $ 2,255,454
Principal amount | 3,789,000 | 3,060,000
Less: conversion of principal into shares of common stock | (1,500,000) |
Net Principal amount | 2,289,000 | 3,060,000
Less: unamortized debt discount and beneficial conversion feature | (227,528) | (574,330)
Less: unamortized debt issuance costs |  | (230,216)
Notes payable, net of unamortized debt discount and debt issuance costs | 2,061,472 | 2,255,454
Principal amount | 2,289,000 | 3,060,000
Secured Redeemable Convertible Note [Member] |  |
Convertible notes payable, net | 2,301,956 |
Notes payable, net of unamortized debt discount and debt issuance costs | 2,301,956 |
Secured Redeemable Convertible Note [Member] | January 2020 Note [Member] |  |
Convertible notes payable, net | 143,913 |
Net Principal amount | 157,000 |
Less: unamortized debt issuance costs | (39,907) |
Notes payable, net of unamortized debt discount and debt issuance costs | 143,913 |
Principal amount | 157,000 |
Add: prepayment premium | 23,550 |
Add: accrued interest | 3,270 |
Secured Redeemable Convertible Note [Member] | February 2020 Note [Member] |  |
Convertible notes payable, net | 96,571 |
Net Principal amount | 126,000 |
Less: unamortized debt issuance costs | (43,604) |
Notes payable, net of unamortized debt discount and debt issuance costs | 96,571 |
Principal amount | 126,000 |
Add: prepayment premium | 12,600 |
Add: accrued interest | $ 1,575 |
Convertible Debt [Member] |  |
Convertible notes payable, net |  | 2,255,454
Notes payable, net of unamortized debt discount and debt issuance costs |  | $ 2,255,454

X
- Definition Amount, before unamortized (discount) premium and debt issuance costs and amount converted, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References No definition available. + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: 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)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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