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Note 3 - Summary of Significant Accounting Policies (Details Textual)		3 Months Ended	6 Months Ended
	Apr. 27, 2020 USD ($)	Mar. 31, 2020	Jun. 30, 2020 USD ($) shares	Jun. 30, 2019 USD ($) shares	Dec. 31, 2019 USD ($)
Number of Operating Segments			2
Accounts Receivable, Allowance for Credit Loss, Ending Balance			$ 10,000		$ 10,000
Proceeds from Notes Payable, Total			$ 272,099
Options and Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) \| shares			7,686,628	5,053,832
Paycheck Protection Program CARES Act [Member]
Proceeds from Notes Payable, Total	$ 272,000
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		2 years
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		7 years