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Note 4 - Net Loss Per Share (Details) - Outstanding potentially dilutive options, warrants and convertible notes
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Equity Option [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities 134,941 63,662
Warrant [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities 81,044 83,977
Convertible Debt Securities [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities 122,125 115,520