Note 7 - Commitments and Contingencies (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jan. 01, 2019
Operating Lease, Remaining Lease Term (Year)			2 years 109 days
Operating Lease, Liability, Current	$ 111,970		$ 111,477	$ 100,000
Operating Lease, Liability, Noncurrent	$ 111,787		$ 135,566	$ 200,000
Lessee, Operating Lease, Discount Rate	10.00%
Lessee, Operating Lease, Renewal Term (Year)	5 years
Operating Lease, Expense	$ 30,000	$ 20,000
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	90.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 17,000	$ 18,000