Note 7 - Commitments and Contingencies (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Operating Lease, Remaining Lease Term			2 years 219 days
Operating Lease, Liability, Current	$ 110,969		$ 110,969
Operating Lease, Liability, Noncurrent	$ 158,747		$ 158,747
Lessee, Operating Lease, Discount Rate	10.00%		10.00%
Lessee, Operating Lease, Renewal Term	5 years		5 years
Operating Lease, Expense	$ 30,000	$ 28,000	$ 80,000	$ 84,000