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Note 6 - Stockholders' Equity (Details Textual)
9 Months Ended
Sep. 01, 2021
$ / shares
shares
Feb. 05, 2021
$ / shares
shares
Dec. 15, 2020
USD ($)
$ / shares
shares
Sep. 25, 2020
USD ($)
$ / shares
shares
Aug. 12, 2020
$ / shares
shares
Jul. 01, 2020
USD ($)
$ / shares
shares
Apr. 01, 2020
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
Sep. 30, 2020
USD ($)
Dec. 31, 2020
$ / shares
Nov. 01, 2020
$ / shares
Oct. 05, 2018
$ / shares
shares
Aug. 21, 2018
USD ($)
$ / shares
shares
Warrants and Rights Outstanding, Reduction of Revenue During Period | $               $ 26,955 $ 26,955        
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares     $ 0.001         $ 0.001   $ 0.001      
Shares Issued, Price Per Share (in dollars per share) | $ / shares             $ 1.08            
Proceeds from Issuance of Private Placement | $               $ 0 3,000,000        
Proceeds from Issuance of Common Stock | $               $ 0 $ 7,257,925        
Private Placement [Member]                          
Shares Issued, Price Per Share (in dollars per share) | $ / shares           $ 1.67              
Stock Issued During Period, Shares, New Issues (in shares)           1,796,407              
Proceeds from Issuance of Private Placement | $           $ 3,000,000.0              
Public Stock Offering [Member]                          
Shares Issued, Price Per Share (in dollars per share) | $ / shares       $ 1.70                  
Stock Issued During Period, Shares, New Issues (in shares)       4,705,883                  
Cash Fee for Per Share of Common (in dollars per share) | $ / shares       $ 0.12325                  
Proceeds from Issuance of Common Stock | $       $ 7,400,000                  
President and Chief Executive Officer [Member]                          
Shares Issued, Price Per Share (in dollars per share) | $ / shares                     $ 1.5779    
Performance Shares [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)             1,444,000            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)             10 years            
Performance Shares [Member] | President and Chief Executive Officer [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)             300,000            
Performance Shares [Member] | Chief Financial Officer [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)             200,000            
Restricted Stock Units (RSUs) [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)             103,000            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)             3 years            
Shares Issued, Price Per Share (in dollars per share) | $ / shares             $ 1.08            
Restricted Stock Units (RSUs) [Member] | Director One [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)             10,000            
Restricted Stock Units (RSUs) [Member] | Director Two [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)             30,000            
Measurement Input, Risk Free Interest Rate [Member]                          
Warrants and Rights Outstanding, Measurement Input                         0.0277
Measurement Input, Expected Term [Member]                          
Warrants and Rights Outstanding, Measurement Input                         5
Measurement Input, Expected Dividend Rate [Member]                          
Warrants and Rights Outstanding, Measurement Input                         0
Measurement Input, Price Volatility [Member]                          
Warrants and Rights Outstanding, Measurement Input                         0.646
Maximum [Member] | Public Stock Offering [Member]                          
Payments of Stock Issuance Costs | $       $ 100,000                  
Common Stock Warrants [Member]                          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                         150,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares $ 5.97 $ 5.88     $ 3.46                
Warrants and Rights Outstanding | $                         $ 135,764
Stock Issued During Period, Shares, Warrants Exercised (in shares) 19,950 19,795     27,051                
Class of Warrant or Right, Number of Warrants Exercised (in shares) 30,000 30,000     60,000                
Common Stock Warrants, Tranche One [Member]                          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                         30,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                       $ 1.80  
Common Stock Warrants, Tranche One [Member] | Measurement Input, Share Price [Member]                          
Warrants and Rights Outstanding, Measurement Input                         0.94
Common Stock Warrants, Tranche Two through Five [Member]                          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                       120,000 120,000
Warrants and Rights Outstanding, Term (Year)                         4 years
Class of Warrant or Right, Exercise Price of Warrants or Rights, Maximum Percentage of Market Price of Common Stock                         120.00%
Common Stock Warrants, Tranche Two through Five [Member] | Measurement Input, Share Price [Member]                          
Warrants and Rights Outstanding, Measurement Input                         0.90
Common Stock Warrants, Tranche Two through Five [Member] | Maximum [Member]                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                         $ 2.00
Common Stock Warrants, Tranche Two [Member]                          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                         30,000
Warrants Issued to Acquire Information Management Solutions, LLC [Member]                          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)     945,599                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares     $ 4.23                    
Warrants and Rights Outstanding | $     $ 552,283                    
Class of Warrant or Right, Issued During Period (in shares)     945,599                    
Class of Warrant or Right, Term Following Vesting (Year)     5 years                    
Warrants Issued to Acquire Information Management Solutions, LLC [Member] | Measurement Input, Share Price [Member]                          
Warrants and Rights Outstanding, Measurement Input     0.58                    
Warrants Issued to Acquire Information Management Solutions, LLC [Member] | Measurement Input, Risk Free Interest Rate [Member]                          
Warrants and Rights Outstanding, Measurement Input     0.0009                    
Warrants Issued to Acquire Information Management Solutions, LLC [Member] | Measurement Input, Expected Term [Member]                          
Warrants and Rights Outstanding, Measurement Input     5                    
Warrants Issued to Acquire Information Management Solutions, LLC [Member] | Measurement Input, Expected Dividend Rate [Member]                          
Warrants and Rights Outstanding, Measurement Input     0                    
Warrants Issued to Acquire Information Management Solutions, LLC [Member] | Measurement Input, Price Volatility [Member]                          
Warrants and Rights Outstanding, Measurement Input     0.599