Note 6 - Stockholders' Equity (Detail) - The following is a summary of outstanding stock options under the Plan: (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Quantity	5,016,916	4,117,979
Quantity	4,612,416
Weighted-average exercise price (in Dollars per share)	$ 4.54	$ 5.21
Weighted-average exercise price (in Dollars per share)	$ 4.66
Weighted Average Remaining Contractual Term (in Years)	7 years 120 days
Weighted Average Remaining Contractual Term (in Years)	7 years 73 days
Intrinsic value (in Dollars)	$ 38,634
Intrinsic value (in Dollars)	$ 33,522

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

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