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Note 5 - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Intangible assets $ 749,501 $ 629,998
Less Accumulated amortization (269,441) (141,282)
Intangible assets, net 480,060 488,716
Customer Relationships [Member]    
Intangible assets 544,770 494,315
Patents [Member]    
Intangible assets $ 204,731 $ 135,683