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Note 14 - Stock Based Compensation (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
May 14, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Mar. 24, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)   175,000 225,000 3,818,921 3,140,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)   699,410 225,000 699,410 225,000  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)   $ 2.46 $ 2.40 $ 2.46 $ 2.40  
Share-based Payment Arrangement, Expense   $ 1,794,138 $ 663,593 $ 3,647,999 $ 2,387,829  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares, Ending Balance (in shares)   4,447,789   4,447,789    
Share-based Payment Arrangement, Option [Member]            
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount   $ 9,245,529   $ 9,245,529    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       1 year 7 months 28 days    
The 2020 Stock Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)           3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares) 15,000,000          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)   11,926,079   11,926,079    
The 2020 Stock Incentive Plan [Member] | Share-based Payment Arrangement, Option [Member]            
Share-based Payment Arrangement, Expense   $ 1,794,138 $ 663,593 $ 3,647,999 $ 2,387,829