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Note 3 - Property and Equipment (Details) - Property and Equipment (USD $)
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 618,892 $ 532,290
Accumulated depreciation and amortization (498,666) (429,804)
Property and equipment, net 120,227 102,486
Laboratory Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 474,602 388,000
Leasehold Improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 115,605 115,605
Other Furniture, Fixtures and Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 28,685 $ 28,685