Note 8 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

	2018			2017
Statutory federal income tax benefit	$	2,118,160		$	2,633,841
State tax benefit, net of federal taxes		66,117			76,922
Foreign tax benefit		132,931			-
Foreign operations tax rate differential		(94,373	)		-
State rate adjustment		15,355			(77,556	)
R&D tax credit		22,532			-
Nondeductible/nontaxable items		(118,905	)		(757,149	)
State NOL adjustment		746,479			-
OID and derivatives		(159,037	)		-
NQSO adjustment		-			537,884
New federal rate adjustment		-			(4,974,121	)
Other		47,868			(8,336	)
Valuation allowance decrease (increase)		(2,777,127	)		2,568,515
Total income tax benefit (expense)	$	-		$	-

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

	2018			2017
Deferred tax assets:
Noncurrent:
Depreciation	$	4,488		$	3,251
Inventory		6,991			6,950
Compensation accruals		60,905			50,436
Accruals and reserves		77,777			64,732
Charitable contribution carryover		3,972			4,068
Derivatives		57,276			-
Related party investments		481,652			-
Intangibles		2,020			-
NQSO compensation		1,019,139			766,648
NOL and credits		9,655,388			7,479,505
Total deferred tax assets		11,369,608			8,375,590
Deferred tax liabilities:
Noncurrent:
Original issue discount		(216,891	)		-
Total deferred tax liabilities		(216,891	)		-
Net deferred tax assets		11,152,717			8,375,590
Less: valuation allowance		(11,152,717	)		(8,375,590	)
Total	$	-		$	-