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Note 5 - Stockholders' Equity (Deficit) (Details Textual) - USD ($)
12 Months Ended
Feb. 04, 2021
Apr. 29, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2018
Dec. 31, 2016
Preferred Stock, Shares Authorized (in shares)     15,000,000 15,000,000    
Common Stock, Par or Stated Value Per Share (in dollars per share)     $ 0.00001 $ 0.00001    
Preferred Stock, Shares Issued, Total (in shares)     0 0    
Common Stock, Shares Authorized (in shares)     50,000,000 50,000,000    
Stock Issued During Period, Shares, New Issues (in shares) 2,530,000          
Net Proceeds from Issuance of Common Stock $ 27,600,000          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)     0      
Share Price (in dollars per share)     $ 4.71      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value     $ 2,382,955 $ 210,055    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value     $ 19,325 83,774    
Employee Benefits and Share-based Compensation       $ 1,434,132    
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)     769,486 794,325    
Share-based Payment Arrangement, Expense     $ 0      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     0 0    
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount     $ 7,133,264      
Sharebased Compensation Arrangement by Sharebased Payment Award Unvesting Period1 (Year)     2 years 7 months 6 days      
Stock Issued During Period, Value, Issued for Services     $ 344,830 $ 145,200    
Warrants Exercised Cashless Shares (in shares)     309,252      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)     121,111      
Legal and Consulting Services            
Stock Issued During Period, Shares, Issued for Services (in shares)       314,535    
Stock Issued During Period, Value, Issued for Services       $ 255,717    
Founder [Member]            
Stock Issued During Period, Shares, Issued for Services (in shares)     78,431      
Stock Issued During Period, Value, Issued for Services       $ 213,332    
Share-based Payment Arrangement, Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)     0 0    
Compensation Expense, Excluding Cost of Good and Service Sold     $ 11,402 $ 1,742,705    
Restricted Stock Units (RSUs) [Member]            
Weighted average grant date fair value (in dollars per share)     $ 11.68 $ 5.94    
Total Fair Market Value Vested     $ 7,345,734 $ 1,036,070    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     1,119,323 606,500    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)     4 years      
Shares Issued, Value, Share-based Payment Arrangement, before Forfeiture     $ 8,165,539 $ 1,070,936    
Restricted Stock Units (RSUs) [Member] | Employee [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     466,266      
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     415,000      
Restricted Stock Units (RSUs) [Member] | Board Members [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     206,068      
Restricted Stock Units (RSUs) [Member] | Board Members [Member] | Share-based Payment Arrangement, Tranche One [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     50.00%      
Restricted Stock Units (RSUs) [Member] | Board Members [Member] | Share-based Payment Arrangement, Tranche Two [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     50.00%      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value     $ 2,524,333      
Restricted Stock Units (RSUs) [Member] | Consultants [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     31,989      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value     $ 381,564      
The 2016 Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)           2,227,777
Share-based Compensation Arrangement by Share-based Payment Award Plan, Expiration Period (Year)           10 years
The 2018 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 Plan, Expiration Period (Year)         10 years  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares)     0      
The 2018 Incentive Plan [Member] | Officers and Directors [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period (in shares)   1,487,500        
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)   822,500