Note 8 - Commitments (Details Textual)	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) ft²	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) ft²	Jun. 30, 2020 USD ($)
Unrecorded Unconditional Purchase Obligation, Total	$ 1,047,000		$ 1,047,000
Unrecorded Unconditional Purchase Obligation Reimbursable, Amount	$ 211,326		$ 211,326
Office and Laboratory Lease Agreement [Member]
Area of Real Estate Property (Square Foot) | ft²	8,400		8,400
Operating Lease, Expense	$ 42,803	$ 41,539	$ 85,607	$ 83,078
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year	85,607		85,607
Lessee, Operating Lease, Liability, to be Paid, Year One	$ 176,356		$ 176,356