Note 15 - Concentrations (Details Textual)	3 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)
Revenue from Contract with Customer, Including Assessed Tax	$ 1,557,942	$ 983,979
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Major Customers	2	3
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer One [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 651,402	$ 341,920
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Two [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 441,787	122,908
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Three [Member]
Revenue from Contract with Customer, Including Assessed Tax		$ 114,914