Note 10 - Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($)	Mar. 31, 2017	Mar. 31, 2016
Deferred tax assets (liabilities):
Net operating loss carry-forward	$ 915,000	$ 1,407,000
Stock based compensation	279,000	239,000
Other	11,000	11,000
Deferred tax assets	1,205,000	1,657,000
Valuation allowance	(279,000)	(800,000)
Deferred tax asset, net	$ 926,000	$ 857,000