Note 10 - Stock-Based Compensation (Detail) - Summary of stock option activity (USD $)	9 Months Ended
Sep. 30, 2012
Outstanding, September 30, 2012	3,924,207
Outstanding, September 30, 2012 (in Dollars per share)	$ 0.49
Outstanding, September 30, 2012	5 years 317 days
Exercisable, September 30, 2012	2,955,982
Exercisable, September 30, 2012 (in Dollars per share)	$ 0.57
Options [Member]
Outstanding, December 31, 2011	3,264,207
Outstanding, December 31, 2011 (in Dollars per share)	$ 0.65
Outstanding, September 30, 2012	3,924,207
Outstanding, September 30, 2012 (in Dollars per share)	$ 0.49
Outstanding, September 30, 2012	5 years 317 days
Outstanding, September 30, 2012 (in Dollars)	$ 7,960
Exercisable, September 30, 2012	2,955,982
Exercisable, September 30, 2012 (in Dollars per share)	$ 0.57
Exercisable, September 30, 2012	4 years 284 days
Exercisable, September 30, 2012 (in Dollars)	$ 4,391
Granted	1,200,000
Granted (in Dollars per share)	$ 0.25
Expired	(540,000)
Expired (in Dollars per share)	$ 0.91

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

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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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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

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

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including 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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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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