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Note 12 - Grants and Collaboration Revenue (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue from Contract with Customer, Including Assessed Tax	$ 110,417	$ 715,977
Unused Grant Funds	355,010
NIH Grants [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 110,417	654,021
Leidos, Inc. Research Collaborative Agreement [Member]
Revenue from Contract with Customer, Including Assessed Tax		$ 61,956

X

- Definition

The amount of grant funds available for use.

+ References

No definition available.

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X

- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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