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Note 8 - Income Taxes (Detail) - Reconciliation of the Income Tax Benefit (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
U.S. federal statutory rate applied to pretax loss	$ (725,948)	$ (797,921)	$ (934,092)
Permanent differences	2,674	4,216	(77,200)
Research and development credits		32,675	59,959
Change in valuation allowance	$ 723,274	$ 761,030	$ 951,333

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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- Definition

The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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