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Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Details) - Anti-dilutive Securities
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9 Months Ended | |
|---|---|---|
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Sep. 30, 2013
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Sep. 30, 2012
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities | 19,485,691 | 19,448,403 |
|
Equity Option [Member]
|
||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities | 6,739,877 | 6,132,127 |
|
Warrant [Member]
|
||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities | 12,203,489 | 8,945,247 |
|
Convertible Debt Securities [Member]
|
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities | 542,325 | 4,371,029 |