Quarterly report pursuant to Section 13 or 15(d)

Note 1 - Potential Shares of Common Stock Excluded from Diluted Net Loss Per Share (Details)

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Note 1 - Potential Shares of Common Stock Excluded from Diluted Net Loss Per Share (Details) - shares
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Restricted Stock [Member]        
Unvested restricted stock (in shares) 453,846 116,818 453,846 116,818
Employee Stock Option [Member]        
Unvested restricted stock (in shares) 376,275 271,895 376,275 271,895
Warrant [Member]        
Unvested restricted stock (in shares) 90,000   90,000