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Note 6 - Stockholders' Equity (Details) - Stock Options Activity (USD $)
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6 Months Ended |
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Jun. 30, 2014
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| Stock Options Activity [Abstract] | |
| Outstanding at December 31, 2013 | 7,430,225 |
| Outstanding at December 31, 2013 | $ 1.47 |
| Granted | 322,000 |
| Granted | $ 1.04 |
| Exercised | (162,500) |
| Exercised | $ 0.88 |
| Forfeited | (130,000) |
| Forfeited | $ 1.88 |
| Outstanding at June 30, 2014 | 7,459,725 |
| Outstanding at June 30, 2014 | $ 1.46 |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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 option holders acquired shares when converting their stock options into shares. No definition available.
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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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| X | ||||||||||
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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