Note 16 - Concentrations (Details Textual)	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Revenue from Contract with Customer, Including Assessed Tax	$ 736,827	$ 818,286	$ 1,720,806	$ 1,124,242
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Major Customers	3	1
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer One [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 266,338	$ 666,054
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Two [Member]
Revenue from Contract with Customer, Including Assessed Tax	134,847
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Three [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 78,218