Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Note 3 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Revenue from contract with customer $ 7,000 $ 5,000 $ 31,000 $ 35,000
Royalty [Member]        
Revenue from contract with customer 2,047 4,895 26,188 13,985
License [Member]        
Revenue from contract with customer 4,726 4,726 9,953
Diagnostics Segment [Member] | Royalty [Member]        
Revenue from contract with customer 2,047 4,895 26,188 13,985
Diagnostics Segment [Member] | Royalty [Member] | Europe [Member]        
Revenue from contract with customer 2,047 4,895 26,188 13,985
Diagnostics Segment [Member] | Expanded Tc99m Tilmanocept License Agreement [Member] | Europe [Member]        
Revenue from contract with customer 4,726 4,726
Diagnostics Segment [Member] | NAV4694 Sublicense [Member]        
Revenue from contract with customer 9,953
Diagnostics Segment [Member] | License [Member]        
Revenue from contract with customer 4,726 4,726 9,953
Diagnostics Segment [Member] | Product and Service, Other [Member]        
Revenue from contract with customer $ 11,024