Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details)

v3.10.0.1
Note 4 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Revenue from contract with customer $ 22,000   $ 287,000  
Royalty [Member]        
Revenue from contract with customer 2,382 9,842
Royalty [Member] | Diagnostics Segment [Member]        
Revenue from contract with customer 2,382   9,842  
Royalty [Member] | Therapeutics Segment [Member]        
Revenue from contract with customer    
NAV4694 Sublicense [Member]        
Revenue from contract with customer 14,930   272,639  
NAV4694 Sublicense [Member] | Diagnostics Segment [Member]        
Revenue from contract with customer 14,930   272,639  
NAV4694 Sublicense [Member] | Therapeutics Segment [Member]        
Revenue from contract with customer    
License [Member]        
Revenue from contract with customer 19,930 277,639 100,000
License [Member] | Diagnostics Segment [Member]        
Revenue from contract with customer 19,930   277,639 100,000
License [Member] | Therapeutics Segment [Member]        
Revenue from contract with customer  
Product and Service, Other [Member]        
Revenue from contract with customer   15,037  
Product and Service, Other [Member] | Diagnostics Segment [Member]        
Revenue from contract with customer   15,037  
Product and Service, Other [Member] | Therapeutics Segment [Member]        
Revenue from contract with customer    
Europe [Member] | Royalty [Member]        
Revenue from contract with customer 2,382   9,842  
Europe [Member] | Royalty [Member] | Diagnostics Segment [Member]        
Revenue from contract with customer 2,382   9,842  
Europe [Member] | Royalty [Member] | Therapeutics Segment [Member]        
Revenue from contract with customer    
INDIA | Royalty [Member]        
Revenue from contract with customer    
INDIA | Royalty [Member] | Diagnostics Segment [Member]        
Revenue from contract with customer    
INDIA | Royalty [Member] | Therapeutics Segment [Member]        
Revenue from contract with customer    
CHINA | Royalty [Member]        
Revenue from contract with customer    
CHINA | Royalty [Member] | Diagnostics Segment [Member]        
Revenue from contract with customer    
CHINA | Royalty [Member] | Therapeutics Segment [Member]        
Revenue from contract with customer    
CHINA | Expanded Tc99m Tilmanocept License Agreement [Member]        
Revenue from contract with customer 5,000   5,000  
CHINA | Expanded Tc99m Tilmanocept License Agreement [Member] | Diagnostics Segment [Member]        
Revenue from contract with customer 5,000   5,000  
CHINA | Expanded Tc99m Tilmanocept License Agreement [Member] | Therapeutics Segment [Member]        
Revenue from contract with customer