Quarterly report pursuant to Section 13 or 15(d)

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

Note 3 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue from contract with customer	$ 9,000	$ 7,000	$ 45,000	$ 31,000
Royalty [Member]
Revenue from contract with customer	0	2,047	0	26,188
Diagnostics Segment [Member] \| Royalty [Member]
Revenue from contract with customer		2,047		26,188
Diagnostics Segment [Member] \| Royalty [Member] \| Europe [Member]
Revenue from contract with customer	0	2,047	0	26,188
Diagnostics Segment [Member] \| Expanded Tc99m Tilmanocept License Agreement [Member] \| Europe [Member]
Revenue from contract with customer	$ 9,116	$ 4,726	$ 44,665	$ 4,726

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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+ Details