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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, 2014
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Sep. 30, 2013
|
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Anti-dilutive Securities | 20,881,840 | 19,485,691 |
|
Employee Stock Option [Member]
|
||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Anti-dilutive Securities | 7,554,725 | 6,739,877 |
|
Warrant [Member]
|
||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Anti-dilutive Securities | 13,327,115 | 12,203,489 |
|
Convertible Debt Securities [Member]
|
||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Anti-dilutive Securities | 542,325 | |