Note 11 - Income Taxes (Tables)

12 Months Ended

Mar. 31, 2019

Notes Tables

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

	2019		2018
Deferred tax assets (liabilities):
Net operating loss carry-forward	$	637,000	$	554,000
Stock based compensation		-		196,000
Research & development tax credit carry-forward		429,000		495,000
Other		41,000		43,000
Deferred tax assets		1,107,000		1,288,000
Valuation allowance		-		(196,000	)
Deferred tax asset, net	$	1,107,000	$	1,092,000

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

	2019		2018
Statutory federal income tax rate		21%		21%
Change in valuation allowance		(17%)		278%
Effective income tax rate		4%		299%