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Note 13 - Sale of Membership Interests in Nevada Subsidiaries (Details Textual)
9 Months Ended 12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 14, 2021
USD ($)
Aug. 10, 2020
USD ($)
Mar. 24, 2020
USD ($)
Nov. 27, 2019
Oct. 23, 2017
Dec. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Mar. 31, 2022
USD ($)
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Notes Reduction                   $ 2,612,854 $ 0
Proceeds from Divestiture of Interest in Consolidated Subsidiaries                   1,648,772 0
Deconsolidation, Gain (Loss), Amount $ 5,206,208                 5,206,208 $ 0
Promissory Note [Member] | The 0% Note Payable Dated October 23, 2017 [Member]                      
Debt Instrument, Interest Rate, Stated Percentage     0.00%     0.00%          
Receivable with Imputed Interest, Effective Yield (Interest Rate)           20.30%          
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                
Extinguishment of Debt, Amount             $ 3,462,854 $ 3,462,854      
Sale of Stock, Percentage of Ownership before Transaction 100.00%                    
Sale of Stock, Percentage of Ownership after Transaction 0.00%                    
Proceeds from Divestiture of Interest in Consolidated Subsidiaries               1,648,772   $ 1,648,772  
Proceeds From Divestiture of Business, Advances Received $ 400,000           400,000 400,000      
Financing Receivable, after Allowance for Credit Loss, Total 3,025,000           $ 3,025,000 $ 3,025,000      
Receivable with Imputed Interest, Effective Yield (Interest Rate)             8.00% 8.00%      
Deconsolidation, Gain (Loss), Amount               $ 5,206,208      
Note Receivable, Interest Only, Monthly                 $ 60,500    
Quarterly Interest Only Payments on Note Receivable, Years                 1 1  
Number of Quarterly Principal and Interest Payments on Note Receivable                 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  
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 $ 74,647 $ 74,647