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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Restricted Cash and Cash Equivalents, Current, Total $ 1,314,637   $ 1,314,637   $ 2,125,695
Cash, Uninsured Amount 14,198,027   14,198,027   $ 11,346,826
Advertising Expense 39,094 $ 41,141 142,522 $ 166,376  
Research and Development Expense, Total $ 283,524 $ 497,823 $ 1,377,097 $ 1,370,059  
Customer Relationships [Member]          
Finite-Lived Intangible Asset, Useful Life (Year)     5 years    
Minimum [Member]          
Property, Plant and Equipment, Useful Life (Year)     3 years    
Finite-Lived Intangible Asset, Useful Life (Year)     1 year    
Maximum [Member]          
Property, Plant and Equipment, Useful Life (Year)     10 years    
Finite-Lived Intangible Asset, Useful Life (Year)     10 years