Note 10 - Segments - Segments (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Revenue	$ 182,784		$ 286,151		$ 477,727	$ 541,392
Net loss	(3,577,378)	$ (4,529,317)	1,465,104	$ (3,293,184)	(8,106,695)	(1,828,080)
Assets	27,496,401				27,496,401		$ 22,375,510
Corporate, Non-Segment [Member]
Revenue
Net loss	(1,209,399)		4,144,347		(3,916,406)	1,891,547
Assets	4,175,888				4,175,888		130,411
Domestic [Member] | Operating Segments [Member]
Revenue	173,738		259,082		453,551	478,743
Net loss	(524,744)		(917,754)		(865,524)	(1,859,477)
Assets	770,156				770,156		670,841
International [Member] | Operating Segments [Member]
Revenue			1,464			37,044
Net loss	(47,923)		(97,552)		(116,988)	(196,213)
Assets	279,627				279,627		298,952
Helomics Segment [Member] | Operating Segments [Member]
Revenue	9,046		25,605		24,176	25,605
Net loss	(1,795,312)		$ (1,663,937)		(3,207,777)	$ (1,663,937)
Assets	$ 22,270,730				$ 22,270,730		$ 21,275,306