Note 9 - Stockholders' Equity (Details) - Summary of Status of All Stock Option Plans (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Note 9 - Stockholders' Equity (Details) - Summary of Status of All Stock Option Plans [Line Items]
Exercised (in Shares)	(256,818)	(2,464,332)
Exercised	$ 0.19	$ 0.18
All Stock Option Plans [Member]
Note 9 - Stockholders' Equity (Details) - Summary of Status of All Stock Option Plans [Line Items]
Options Outstanding, Balance (in Shares)	12,019,328	14,174,000
Weighted Average Exercise Price	$ 0.21	$ 0.20
Exercisable at year-end (in Shares)	10,287,999	12,019,328
Exercisable at year-end	$ 0.18	$ 0.21
Vested or expected to vest at year-end (in Shares)	10,144,482	11,857,821
Vested or expected to vest at year-end	$ 0.18	$ 0.21
Weighted average fair value of options granted during the period	$ 0.18	$ 0.31
Granted (in Shares)	3,449,999	723,000
Granted	$ 0.14	$ 0.37
Exercised (in Shares)	(256,818)	(2,464,332)
Exercised	$ 0.19	$ 0.18
Forfeited or expired (in Shares)	(4,924,510)	(413,340)
Forfeited or expired	$ 0.24	$ 0.21
Options Outstanding, Balance (in Shares)	10,287,999	12,019,328
Weighted Average Exercise Price	$ 0.18	$ 0.21

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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