Note 6 - Stockholders' Equity (Detail) - Stock Option Activity (USD $)	12 Months Ended
Dec. 31, 2012
Outstanding at December 31, 2011	928,242
Outstanding at December 31, 2011 (in Dollars per share)	$ 5.43
Granted	238,500
Granted (in Dollars per share)	$ 0.70
Exercised	0
Exercised (in Dollars per share)	$ 0
Forfeited or expired	(97,601)
Forfeited or expired (in Dollars per share)	$ 4.02
Outstanding at December 31, 2012	1,069,141
Outstanding at December 31, 2012 (in Dollars per share)	$ 4.50
Outstanding at December 31, 2012	6 years 73 days
Outstanding at December 31, 2012 (in Dollars)	$ 0
Exercisable at December 31, 2012	698,995
Exercisable at December 31, 2012 (in Dollars per share)	$ 6.38
Exercisable at December 31, 2012	4 years 219 days
Exercisable at December 31, 2012 (in Dollars)	$ 0

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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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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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 option holders acquired shares when converting their stock options into shares.

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

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