Note 9 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Summary of Operating Loss Carryforwards [Table Text Block]

Year Ending December 31,	Amount
2020	$	174,000
2021		71,000
2024		66,000
2028		7,000
2030		160,000
2031		73,000
2032		48,000
2034		727,000
2035		1,969,000
2036		2,867,000
2037		2,481,000
Indefinite		3,260,000
Total	$	11,903,000

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

	2018			201 7
Deferred tax assets:
Net operating loss carryforwards	$	3,017,000		$	2,206,000
Tax credits		3,085,000			2,397,000
Impairment allowances		10,000			7,000
Stock compensation		64,000			20,000
Other		62,000			35,000
Less valuation allowance		(6,235,000	)		(4,660,000	)
Deferred tax asset, net of valuation		3,000			5,000
Deferred tax liabilities:
Property and equipment		(3,000	)		(5,000	)
Deferred tax liabilities		(3,000	)		(5,000	)
Net tax assets	$	-		$	-

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

	2018			2017
Tax benefit (expense) at Federal statutory rate	$	894,000		$	1,303,000
Effect of State taxes		185,000			139,000
Tax credits		676,000			1,135,000
Nondeductible expenses		(180,000	)		(435,000	)
Tax Cuts and Jobs Act rate decrease		-			(1,098,000	)
Valuation allowance – deferred tax assets		(1,575,000	)		(1,044,000	)
Total tax benefit (provision)	$	-		$	-