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Note 4 - Balance Sheet Components (Details) - Property and Equipment, and Other Assets (USD $)
Mar. 31, 2014
Dec. 31, 2013
Property and equipment:    
Property and equipment, gross $ 618,892 $ 618,892
Accumulated depreciation and amortization (512,537) (498,666)
Property and equipment, net 106,355 120,227
Other assets:    
Technology licenses 248,855 248,855
Deposits 11,010 11,010
Accumulated amortization – technology licenses (241,355) (238,855)
Total other assets 18,510 21,010
Laboratory Equipment [Member]
   
Property and equipment:    
Property and equipment, gross 474,602 474,602
Leasehold Improvements [Member]
   
Property and equipment:    
Property and equipment, gross 115,605 115,605
Other Furniture, Fixtures and Equipment [Member]
   
Property and equipment:    
Property and equipment, gross $ 28,685 $ 28,685