Note 3 - Revenue From Contracts With Customers (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Contract with Customer, Payment Term, Minimum (Day)			15 days
Contract with Customer, Payment Term, Maximum (Day)			90 days
Contract with Customer, Transaction Price of Royalties Using Expected Value Method	$ 0		$ 0
Revenue from Contract with Customer, Including Assessed Tax	7,516	$ 9,116	14,035	$ 44,665
Contract with Customer, Asset, Impairment Loss	0	0	0	0
Sales Revenue [Member]
Revenue from Contract with Customer, Including Assessed Tax	7,516	0	14,035	0
Contract with Customer, Asset, after Allowance for Credit Loss, Total	7,516		7,516		$ 0
License [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	9,116	0	44,665
Contract with Customer, Asset, after Allowance for Credit Loss, Total	0		0		$ 1,021
Grant [Member]
Revenue Not from Contract with Customer	$ 0	$ 12,266	$ 51,007	$ 86,500
INDIA
Contract with Customer, Term of Contract (Year)			8 years
CHINA
Contract with Customer, Term of Contract (Year)			10 years