| Note 5 - Stockholders' Equity (Details) - Employee Share-Based Compensation Expense (USD $) | 3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | |
| Employee Share-Based Compensation Expense [Abstract] | ||||
| $ 345,632 | $ 300,304 | $ 988,223 | $ 843,866 | |
| X | ||||||||||
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- Details 
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| X | ||||||||||
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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