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Note 5 - Commitments and Contingencies (Details Textual)
 12 Months Ended
Nov. 09, 2021
EUR (€)
Jun. 28, 2019
EUR (€)
Dec. 31, 2021
USD ($)
a
VTT Technical Research Centre of Finland Ltd [Member]      
Commitment Development Period (Year)   3 years  
Commitment Success Bonus Award   € 350,000  
Commitment To Pay, Expanded € 191,700    
Commitment To Pay, Expanded, Period (Year) 6 years    
Jupiter Florida Headqauarters Lease [Member]      
Area of Real Estate Property (Acre) | a     2,000
Operating Leases, Monthly Rental Rate | $     $ 4,400
Netherlands Office Lease [Member]      
Operating Leases, Annual Rental Rate | $     $ 4,000
Commitment To Pay   € 2.52