Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	2019			2018
Current provision:
Federal	$	-		$	-
State		-			-
Foreign		-			-
Total current provision		-			-
Deferred provision (benefit):
Federal		(545,792	)		7,726
State		1,001,786			(2,749,386	)
Foreign		-			-
Total deferred provision (benefit)		455,994			(2,741,660	)
Valuation allowance		(455,994	)		2,741,660
Consolidated income tax provision	$	-		$	-

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2019			2018
Federal statutory rate		(21.0	%)		(21.0	%)
State income taxes, net of Federal benefits		(5.3	%)		(5.0	%)
Rate changes		(6.4	%)		(66.3	%)
Change in fair value of liability classified warrants		(1.6	%)		(17.3	%)
Other, including non-deductible expenses		28.8	%		53.9	%
Valuation allowance		5.5	%		55.7	%
Total		0.0	%		0.0	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	2019			2018
Net operating loss carryforwards	$	43,190,604		$	42,580,533
Stock based compensation expense		2,605,277			2,643,471
Tax credit carryforwards and other		889,372			1,005,255
Gross deferred tax assets		46,685,253			46,229,259
Valuation allowance		(46,685,253	)		(46,229,259	)
Net deferred tax assets	$	-		$	-