Note 1 - Summary of Significant Accounting Policies (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Depreciation (in Dollars)	$ 281,500	$ 169,000	$ 165,000
Finite-Lived Patents, Gross (in Dollars)	73,125
Finite-Lived Intangible Assets, Accumulated Amortization (in Dollars)	$ 45,000
Finite-Lived Intangible Asset, Useful Life	10 years
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)	3,284,214	3,168,511	2,245,046
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)	7,873,503	11,598,617	1,009,076
Minimum [Member]
Property, Plant and Equipment, Estimated Useful Lives	three
Maximum [Member]
Property, Plant and Equipment, Estimated Useful Lives	seven