| Note 5 - Stockholders' Equity (Details) - Activity Under Equity Compensation Plans (USD $) | 9 Months Ended | 
|---|---|
| Sep. 30, 2013 | |
| Activity Under Equity Compensation Plans [Abstract] | |
| Outstanding | 6,432,127 | 
| Outstanding (in Dollars per share) | $ 1.58 | 
| Granted | 452,500 | 
| Granted (in Dollars per share) | $ 1.20 | 
| Forfeited | (144,750) | 
| Forfeited (in Dollars per share) | $ 2.18 | 
| Outstanding | 6,739,877 | 
| Outstanding (in Dollars per share) | $ 1.54 | 
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- Details 
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Gross number of share options (or share units) granted during the period. No definition available. 
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available. 
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available. 
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