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Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Details) - Anti-dilutive Securities
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6 Months Ended | |
|---|---|---|
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Jun. 30, 2013
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Jun. 30, 2012
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities | 20,156,464 | 16,657,470 |
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Equity Option [Member]
|
||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities | 6,754,627 | 6,111,127 |
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Warrant [Member]
|
||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities | 12,859,512 | 6,258,648 |
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Convertible Debt Securities [Member]
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Antidilutive securities | 542,325 | 4,287,695 |