Note 3 - Recently-Adopted Accounting Pronouncements (Details Textual) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Lessee, Operating Lease, Term of Contract	4 years 30 days
Operating Lease, Right-of-Use Asset	$ 173,487
Operating Lease, Liability, Total	$ 174,202
Operating Lease, Weighted Average Remaining Lease Term	1 year 292 days
Operating Lease, Weighted Average Discount Rate, Percent	5.50%
Operating Lease, Expense	$ 78,365	$ 78,365
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset			$ 244,877
Operating Lease, Liability, Total			$ 242,696