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Note 9 - Stockholders' Equity (Details Textual) - USD ($)
 3 Months Ended 12 Months Ended
Jan. 03, 2023
Jun. 23, 2022
May 17, 2022
Aug. 17, 2021
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2013
Dec. 31, 2022
Apr. 08, 2021
Common Stock, Shares Authorized (in shares)         100,000,000     100,000,000  
Common Stock, Par or Stated Value Per Share (in dollars per share)     $ 0.001   $ 0.001     $ 0.001 $ 0.001
Common Stock, Shares, Issued (in shares)         45,271,441     43,986,079  
Preferred Stock, Shares Authorized (in shares)         2,500,000     2,500,000  
Preferred Stock, Par or Stated Value Per Share (in dollars per share)         $ 0.001     $ 0.001  
Preferred Stock, Shares Issued (in shares)         0     0  
Class of Warrant or Right, Issued by Exchange, Shares (in shares)       500,000          
Class of Warrant or Right, Issued During Period (in shares)         0 0      
Common Stock, Shares, Outstanding (in shares)         45,271,441     43,986,079  
Preferred Stock, Shares Outstanding (in shares)         0     0  
Restricted Stock Units (RSUs) [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)         2,832,909     2,408,892  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)         1,709,379        
Share-Based Payment Arrangement, Expense         $ 157,174 $ 178,778      
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount         $ 1,122,970        
Restricted Stock Units (RSUs) [Member] | Incentive Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)         1,123,529        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)         1,123,529        
Restricted Stock Units (RSUs) [Member] | The 2022 Incentive Plan [Member]                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)         1,709,379        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)         1,709,379        
Public Offering [Member]                  
Shares Issued, Price Per Share (in dollars per share)     0.50            
Private Placement [Member]                  
Proceeds from Issuance of Debt   $ 6,000,000              
Prefunded Warrants [Member]                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)       $ 0.001          
Warrant Purchase Agreement [Member]                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)     $ 0.499            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)     30,425,000            
Proceeds from Issuance or Sale of Equity, Total     $ 15,182,075            
Private Placement Warrants [Member]                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 0.65              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   4,250,000              
Class of Warrant or Right, Issued During Period (in shares)   230,770              
Director [Member]                  
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares) 18,719                
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures $ 110,254                
Director [Member] | Restricted Stock Units (RSUs) [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)             25,000    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)             3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Annual Grant             $ 36,750    
Management [Member]                  
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares) 1,266,643                
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures $ 674,164                
Board of Directors Chairman [Member] | Restricted Stock Units (RSUs) [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Annual Grant             $ 73,500    
Convertible Preferred Stock [Member]                  
Preferred Stock, Shares Issued (in shares)         0        
Preferred Stock, Shares Outstanding (in shares)         0