Note 5 - Intangible Assets - Components of Intangible Assets (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Accumulated Amortization	$ (491,116)	$ (414,611)
Net Carrying Amount	3,207,417
Total, Gross Carrying Costs	4,096,533	4,064,023
Total, Net Carrying Amount	3,605,417	3,649,412
Trade Names [Member]
Tradename	398,000	398,000
Patents and Trademarks [Member]
Gross Carrying Costs	371,533	339,023
Accumulated Amortization	(198,686)	(195,286)
Net Carrying Amount	172,847	143,737
Developed Technology Rights [Member]
Gross Carrying Costs	2,882,000	2,882,000
Accumulated Amortization	(144,097)	(108,075)
Net Carrying Amount	2,737,903	2,773,925
Customer Relationships [Member]
Gross Carrying Costs	445,000	445,000
Accumulated Amortization	(148,333)	(111,250)
Net Carrying Amount	$ 296,667	$ 333,750