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Note 12 - Convertible Notes Payable - Convertible Notes Payable (Details) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Senior Secured Convertible Note [Member] | The Amended and Original Notes [Member]
Securities Purchase Agreement dated July 10, 2019		$ 2,255,454
Principal amount	3,789,000	3,060,000
Less: conversion of principal into shares of common stock	(3,789,000)
Net Principal amount		3,060,000
Less: unamortized debt discount and beneficial conversion feature		(574,330)
Less: unamortized debt issuance costs		(230,216)
Notes payable, net of unamortized debt discount and debt issuance costs		2,255,454
Principal amount		3,060,000
Secured Redeemable Convertible Note [Member]
Securities Purchase Agreement dated July 10, 2019	2,201,017
Notes payable, net of unamortized debt discount and debt issuance costs	2,201,017
Secured Redeemable Convertible Note [Member] | February 2020 Note [Member]
Securities Purchase Agreement dated July 10, 2019	150,849
Net Principal amount	126,000
Less: unamortized debt issuance costs	(17,151)
Notes payable, net of unamortized debt discount and debt issuance costs	150,849
Principal amount	126,000
Add: prepayment premium	37,170
Add: accrued interest	4,830
Secured Redeemable Convertible Note [Member] | May 2020 Note [Member]
Securities Purchase Agreement dated July 10, 2019	1,196,837
Net Principal amount	2,415,000
Less: unamortized debt discount and beneficial conversion feature	(1,013,146)
Less: unamortized debt issuance costs	(205,017)
Notes payable, net of unamortized debt discount and debt issuance costs	1,196,837
Principal amount	2,415,000
Secured Redeemable Convertible Note [Member] | June 2020 Note [Member]
Securities Purchase Agreement dated July 10, 2019	853,331
Net Principal amount	1,811,250
Less: unamortized debt discount and beneficial conversion feature	(745,575)
Less: unamortized debt issuance costs	(212,344)
Notes payable, net of unamortized debt discount and debt issuance costs	853,331
Principal amount	1,811,250
Secured Redeemable Convertible Note [Member] | January 2020 Note [Member]
Securities Purchase Agreement dated July 10, 2019
Notes payable, net of unamortized debt discount and debt issuance costs
Convertible Debt [Member]
Securities Purchase Agreement dated July 10, 2019		2,255,454
Notes payable, net of unamortized debt discount and debt issuance costs		$ 2,255,454

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- 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.

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