Annual report pursuant to Section 13 and 15(d)

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

v3.19.1
Note 4 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Revenue from contract with customer $ 338,000  
Royalty [Member]    
Revenue from contract with customer 15,347 $ 9,126
Royalty [Member] | Diagnostics Segment [Member]    
Revenue from contract with customer 15,347 9,126
Royalty [Member] | Therapeutics Segment [Member]    
Revenue from contract with customer
NAV4694 Sublicense [Member]    
Revenue from contract with customer 287,569  
NAV4694 Sublicense [Member] | Diagnostics Segment [Member]    
Revenue from contract with customer 287,569  
NAV4694 Sublicense [Member] | Therapeutics Segment [Member]    
Revenue from contract with customer  
License [Member]    
Revenue from contract with customer 307,174 100,000
License [Member] | Diagnostics Segment [Member]    
Revenue from contract with customer 307,174 100,000
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 15,347  
Europe [Member] | Royalty [Member] | Diagnostics Segment [Member]    
Revenue from contract with customer 15,347  
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 19,605  
CHINA | Expanded Tc99m Tilmanocept License Agreement [Member] | Diagnostics Segment [Member]    
Revenue from contract with customer 19,605  
CHINA | Expanded Tc99m Tilmanocept License Agreement [Member] | Therapeutics Segment [Member]    
Revenue from contract with customer