Note 9 - Commitments (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) ft²	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) ft²	Sep. 30, 2019 USD ($)
Area of Real Estate Property (Square Foot) | ft²	8,400		8,400
Operating Leases, Rent Expense, Total	$ 41,539	$ 40,316	$ 124,617	$ 120,949
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year	41,539		41,539
Lessee, Operating Lease, Liability, to be Paid, Year One	171,213		171,213
Lessee, Operating Lease, Liability, to be Paid, Year Two	176,356		176,356
Unrecorded Unconditional Purchase Obligation, Total	290,500		290,500
Purchase Obligation, to be Paid, Remainder of Fiscal Year	228,000		228,000
Purchase Obligation, to be Paid, Year One	$ 62,500		$ 62,500