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Note 9 - Accrued Expenses (Details) - Accrued Expenses (USD $)
Sep. 30, 2014
Dec. 31, 2013
Accrued Expenses [Abstract]    
Labor and related expenses $ 2,842,234 $ 2,870,147
Clinical trial costs 962,031 882,651
Professional fees 382,423 383,231
Research grants 562,558 610,498
Restructuring costs 11,909 24,638
Other 492,538 766,716
Total $ 5,253,693 $ 5,537,881