Note 2 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

	Years ended December 31,
	2019			2018			Variance
U.S. Department of Defense		57.2	%		46.3	%		10.9	%
Incuron, Inc		42.8	%		53.7	%		(10.9	)%
		100.0	%		100.0	%		—	%

Property Plant and Equipment Useful Lives [Table Text Block]

Asset Category	Estimated Useful Life (in Years)
Laboratory equipment		5
Furniture and fixtures		5
Computer equipment		3

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Gains and losses on foreign exchange translations
Beginning balance	$	(611,370	)
Other comprehensive income (loss) before reclassifications		43,340
Ending balance	$	(568,030	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	As of December 31,
Common Equivalent Securities	2019		2018
Warrants		327,253		528,054
Options		136,105		160,076
Total		463,358		688,130