Annual report pursuant to Section 13 and 15(d)

Note 3 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details)

v3.21.1
Note 3 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Revenue from contract with customer $ 119,000 $ 38,000
Royalty [Member]    
Revenue from contract with customer 7,995 16,665
License [Member]    
Revenue from contract with customer 110,730 9,953
Diagnostics Segment [Member] | Royalty [Member]    
Revenue from contract with customer 7,995 16,665
Diagnostics Segment [Member] | Royalty [Member] | Europe [Member]    
Revenue from contract with customer 7,995 16,665
Diagnostics Segment [Member] | Expanded Tc99m Tilmanocept License Agreement [Member] | Europe [Member]    
Revenue from contract with customer 110,730
Diagnostics Segment [Member] | NAV4694 Sublicense [Member]    
Revenue from contract with customer 9,953
Diagnostics Segment [Member] | License [Member]    
Revenue from contract with customer 110,730 9,953
Diagnostics Segment [Member] | Product and Service, Other [Member]    
Revenue from contract with customer $ 11,024