Note 3 - Fair Value Measurements (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Assets, Fair Value Disclosure	$ 452,301	$ 504,940
Percentage Increase in The Expected Term	10.00%
Percentage Increase in Warrant Liability with Increase in Expected Term	3.00%
Percentage Decrease in Expected Term	10.00%
Percentage Decrease in Warrant Liability with Decrease in Expected Term	3.00%
Percentage Increase in The Stock Price		10.00%
Percentage Increase in Warrant Liability with Increase in Stock Price	30.00%
Percentage Decrease in The Stock Price	10.00%
Percentage Decrease in Warrant Liability with Decrease in Stock Price	26.00%
Fair Value, Nonrecurring [Member]
Assets, Fair Value Disclosure	$ 0	$ 0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 0	$ 0