Note 9 - Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

	Warrant shares outstanding		Weighted Average exercise price		Weighted Average remaining life		Intrinsic value
Outstanding at January 1, 2020		1,074,171	$	0.50		4.10	$	956,012
Issued		6,459,000		2.01		3.00		-
Exercised		(1,081,475)		0.88		-		-
Expired or cancelled		-		-		-		-
Outstanding and exercisable at June 30, 2020		6,451,696	$	1.95		2.98	$	2,430,184

	Warrant shares outstanding		Weighted Average exercise price		Weighted Average remaining life		Intrinsic value
Outstanding at January 1, 2019		1,592,775	$	2.55		0.48	$	-
Issued		1,749,171		0.50		4.60		-
Exercised						-		-
Expired or cancelled		-		-		-		-
Outstanding and exercisable at June 30, 2019		3,341,946	$	1.48		2.60	$	-

Deferred Compensation Arrangement with Individual, Share-based Payments [Table Text Block]

	June 30, 2020			June 30, 2019
Shares-to-be-issued, outstanding January 1,		2,375,760			2,470,565
Granted in current period		358,482			1,029,424
Issued in current period		(214,612	)		(596,623	)
Shares-to be issued outstanding June 30,		2,519,630			2,903,366

Schedule of Warrant or Right Outstanding and Options, Valuation Assumptions [Table Text Block]

		2016 Warrants	2019 Warrants
Expected Term (years)		.04 years		5 years
Volatility		100%		85	%
Dividend yield		0%		0	%
Exercise Price	$	2.55	$	0.50
Risk-free interest rate		2.09%		2.50	%
Weighted average fair value of warrants granted		-	$	0.22
Number of shares underlying warrants granted		201,044		1,749,171

		2016 Warrants	2019 Warrants
Expected Term (years)		.04 years		4.6
Volatility		100%		85	%
Dividend yield		0%		0	%
Exercise Price	$	2.55	$	0.50
Risk-free interest rate		2.09%		1.76	%
Weighted average fair value of warrants granted		-	$	0.21