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Note 8 - Sale of Membership Interests in Nevada Subsidiaries (Details Textual)
9 Months Ended 12 Months Ended 21 Months Ended
Dec. 31, 2021
USD ($)
Aug. 10, 2020
USD ($)
Mar. 24, 2020
USD ($)
Nov. 27, 2019
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Mar. 04, 2022
Notes Reduction         $ 0 $ 2,612,854        
Promissory Note [Member] | The 0% Note Payable Dated October 23, 2017 [Member]                    
Debt Instrument, Interest Rate, Stated Percentage   0.00%               8.00%
Extinguishment of Debt, Amount         $ 34,984          
GB Sciences Nopah, LLC [Member]                    
Sale of Stock, Percentage of Ownership       100.00%            
Noncash or Part Noncash Divestiture, Amount of Consideration Received   $ 312,315                
Nevada Subsidiaries [Member]                    
Sale of Stock, Percentage of Ownership     100.00%              
Teco Subsidiaries [Member]                    
Sale of Stock, Consideration Received on Transaction     $ 8,000,000              
Notes Receivable, Interest Rate     8.00%              
GB Sciences Nopah, LLC [Member]                    
Notes Reduction   237,668                
Sale of Stock, Percentage of Ownership before Transaction 100.00%                  
Sale of Stock, Percentage of Ownership after Transaction 0.00%                  
Financing Receivable, after Allowance for Credit Loss, Total $ 3,025,000         $ 3,025,000        
Note Receivable, Interest Only, Monthly                 $ 60,500  
Quarterly Interest Only Payments on Note Receivable, Years         1     1 1  
Number of Quarterly Principal and Interest Payments on Note Receivable         7     7 7  
Note Receivable, Quarterly Principal and Interest Installment             $ 201,774      
Final Payment, Principal and Interest Payments Due on Note Receivable         $ 2,014,225     $ 2,014,225 $ 2,014,225  
Asset Impairment Charges, Total               $ 3,025,000    
GB Sciences Nopah, LLC [Member] | Accounts Payable Due to Affiliate of the Purchaser [Member]                    
Extinguishment of Debt, Amount   $ 74,647