Note 3 - Convertible Notes (Details Textual) | | | | | | | 1 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | | |
Mar. 04, 2022 USD ($) | Jan. 20, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 14, 2021 USD ($) | Dec. 29, 2020 USD ($) | Oct. 23, 2017 USD ($) | Mar. 31, 2022 USD ($) | Jul. 31, 2017 USD ($) $ / shares | Mar. 31, 2017 USD ($) $ / shares | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | May 31, 2017 USD ($) $ / shares shares | Dec. 31, 2017 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) | Dec. 18, 2020 USD ($) $ / shares | Mar. 31, 2023 USD ($) $ / shares shares | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Aug. 10, 2020 USD ($) | Jul. 24, 2020 USD ($) |
Amortization of Debt Discount (Premium) | | | | | | | | | | $ 15,075 | $ 15,976 | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | 1,462,307 | | | | | | | | | | |
Proceeds from Convertible Debt | | | | | | | | | | 25,000 | $ 0 | | | | | | | | | |
Warrants Issued in March 2017 Convertible Note Offering [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Convertible, Number of Warrants | | | | | | | | | 4,000 | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares | | | | | | | | | $ 0.60 | | | $ 0.60 | | | | | | | | |
Warrants and Rights Outstanding, Term (Year) | | | | | | | | | 3 years | | | 3 years | | | | | | | | |
Class of Warrant or Right, Issued (in shares) | shares | | | | | | | | | | | | 8,000,000 | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares | | | | | | | | | | | | 1 | | | | | | | | |
Warrants Issued In March 2017 and July 2017 Convertible Note Offerings [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Convertible, Number of Warrants | | | | | | | | 4,000 | | | | | | | | | | | | |
Class of Warrant or Right, Issued During Period (in shares) | shares | | | | | | | | | | | | | | | | 788,000 | | | | |
Warrants Related to July 2017 Convertible Note Offering [Member] | | | | | | | | | | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares | | | | | | | | $ 0.65 | | | | | $ 0.60 | | | | | | | |
Warrants and Rights Outstanding, Term (Year) | | | | | | | | | | | | | 3 years | | | | | | | |
Class of Warrant or Right, Issued (in shares) | shares | | | | | | | | | | | | | 28,804,000 | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares | | | | | | | | | | | | | 1 | | | | | | | |
Warrants Issued in September 30, 2023, Convertible Note Offering [Member] | | | | | | | | | | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares | | | | | | | | | | | | | | | | $ 0.10 | | | | |
Warrants and Rights Outstanding, Term (Year) | | | | | | | | | | | | | | | | 3 years | | | | |
Warrants and Rights Outstanding | | | | | | | | | | | | | | | | $ 13,396 | | | | |
Promissory Note [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | 1,437,307 | | | | | | 1,437,307 | | | | |
GB Sciences Nopah, LLC [Member] | | | | | | | | | | | | | | | | | | | | |
Financing Receivable, after Allowance for Credit Loss, Total | | | $ 3,025,000 | | | | $ 60,500 | | | | | | | $ 3,025,000 | | | $ 60,500 | | | |
GB Sciences Nopah, LLC [Member] | Accounts Payable Due to Affiliate of the Purchaser [Member] | | | | | | | | | | | | | | | | | | | | |
Extinguishment of Debt, Amount | | | 74,647 | $ 74,647 | | | | | | | | | | | | | | | | |
Teco Subsidiaries [Member] | The July 24 Note [Member] | | | | | | | | | | | | | | | | | | | | |
Financing Receivable, after Allowance for Credit Loss, Total | | | 1,025,000 | | $ 3,025,000 | | | | | | | | | 1,025,000 | | | | | | |
Increase (Decrease) in Notes Receivable, Current | | | | | 975,000 | | | | | | | | | | | | | | | |
Notes Receivable, Maximum Allowed Prepayments On Note | | | | | 325,000 | | | | | | | | | | | | | | | |
Disposal Group, Including Discontinued Operation, Consideration | | | | | $ 4,000,000 | | | | | | | | | | | | | | | |
Gain (Loss) on Amendment to Line of Credit | | | | | | | | | | | | | | | | | | $ (650,000) | | |
Notes Receivable, Additional Advances | | | | | | | | | | | | | | 50,000 | | | | | | |
Interest and Debt Expense, Total | | | | | | | | | | | | | | 12,510 | | | | | | |
Promissory Note [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | 25,000 | | | | | | | | | | |
Convertible Debt [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Unamortized Discount | | | | | | | | | | 4,859 | | | | | | | | | | |
Interest Expense, Debt | | | | | | | | | | 11,169 | | | | | | | | | | |
Interest Payable | | | | | | | | | | 206,939 | | | | | | | | | | |
Convertible Notes Payable, Total | | $ 560,000 | | | | | | | | | | | | | | | | | | |
Debt Instrument, Debt Default, Amount | | | | | | | | | | 1,060,000 | | | | | | | | | | |
Repayments of Convertible Debt | | $ 500,000 | | | | | | | | | | | | | | | | | | |
Nevada Medical Marijuana Production License Agreement [Member] | | | | | | | | | | | | | | | | | | | | |
Payments to Acquire License | | | | | | $ 500,000 | | | | | | | | | | | | | | |
Nevada Medical Marijuana Production License Agreement [Member] | Production License [Member] | | | | | | | | | | | | | | | | | | | | |
Ownership of License | | | | | | 100% | | | | | | | | | | | | | | |
Nevada Medical Marijuana Production License Agreement [Member] | Cultivation License [Member] | | | | | | | | | | | | | | | | | | | | |
Ownership of License | | | | | | 100% | | | | | | | | | | | | | | |
The 6 Percent Convertible Note Payable Issued With In Money Conversion Features [Member] | | | | | | | | | | | | | | | | | | | | |
Debt, Current | | | | | | | | | | 1,436,152 | | | | | | | | | | |
Debt Instrument, Unamortized Discount | | | | | | | 6,500 | | | 26,155 | | | | | $ 81,250 | | 6,500 | | | |
Interest Expense, Debt | | | | | | | | | | 40,040 | | | | | | | | | | |
Amortization of Debt Discount (Premium) | | | | | | | | | | 15,075 | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | | | | | | 425,000 | | | | | |
Debt Instrument, Convertible, Beneficial Conversion Feature | | | | | | | | | | | | | | | 347,000 | | | | | |
Proceeds from Convertible Debt | | | | | | | | | | 25,000 | | | | | $ 543,750 | | $ 50,000 | | | |
The 0% Note Payable Dated October 23, 2017 [Member] | Convertible Notes Payable [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | 55,307 | | | | | | | | | | |
The 0% Note Payable Dated October 23, 2017 [Member] | Promissory Note [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Unamortized Discount | | | | | | $ 178,933 | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | 0% | | | | | | | | | | | | | 0% | |
Debt Instrument, Face Amount | | | | | | $ 700,000 | | | | | | | | | | | | | | |
Debt Instrument, Term (Year) | | | | | | 3 years | | | | | | | | | | | | | | |
Debt Instrument, Present Value | | | | | | $ 521,067 | | | | | | | | | | | | | | |
Receivable with Imputed Interest, Effective Yield (Interest Rate) | | | | | | 20.30% | | | | | | | | | | | | | | |
Notes Payable, Current, Total | | | $ 369,445 | | | | | | | | | | | $ 369,445 | | | | | | |
Notes Payable, Principal and Interest | $ 201,532 | | | | | | | | | | | | | | | | | | | |
Notes Payable, Principal and Interest, After Modified Terms | 179,127 | | | | | | | | | | | | | | | | | | | |
Repayment of Notes Payable | 75,000 | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Monthly Payment, Amount | $ 5,000 | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage, After Term Modification | 8% | | | | | | | | | | | | | | | | | | | |
Gain (Loss) on Extinguishment of Debt, Total | | | | | | | $ 22,405 | | | | | | | | | | | | | |
Notes Payable, Current and Noncurrent | | | | | | | | | | 55,307 | | | | | | | | | | |
Interest Payable | | | | | | | | | | 1,454 | | | | | | | | | | |
The 0% Note Payable Dated October 23, 2017 [Member] | Promissory Note [Member] | Membership Interest Purchase Agreement for Sale of Interest in GB Sciences Nopah, LLC [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Principal Balance After Reduction Upon Close of Disposition | | | | | | | | | | | | | | | | | | | $ 190,272 | |
The 0% Note Payable Dated October 23, 2017 [Member] | Convertible Debt [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | | | | | | | $ 55,307 | | | | |
The July 24 Note [Member] | Revolving Credit Facility [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | | | | | | | | | | | | | | 8% |
Line of Credit Facility, Maximum Borrowing Capacity | | | | | | | | | | | | | | | | | | | | $ 500,000 |
The July 24 Note [Member] | Teco Subsidiaries [Member] | | | | | | | | | | | | | | | | | | | | |
Financing Receivable, after Allowance for Credit Loss, Total | | | | | | | | | | | | | | | | | | | | $ 4,000,000 |
Debt Instrument, Forgiveness, Ratio of Notes Receivable Amount Reduced to the Debt Balance Outstanding | | | | | | | | | | | | | | | | | | | | 3 |
March 2017 Convertible Note Offering [Member] | Convertible Notes Payable [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Unamortized Discount | | | | | | | | | | | | $ 1,933,693 | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | | | 6% | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | | | $ 2,000,000 | | | | | | | | |
Debt Instrument, Term (Year) | | | | | | | | | | | | 3 years | | | | | | | | |
Debt Instrument, Face Amount Per Note | | | | | | | | | $ 1,000 | | | | | | | | | | | |
Debt Instrument, Convertible, Beneficial Conversion Feature | | | | | | | | | | | | $ 904,690 | | | | | | | | |
Debt Instrument, Convertible, Discount, Fair Value of Warrants | | | | | | | | | | | | $ 1,029,003 | | | | | | | | |
March 2017 Convertible Note Offering [Member] | Convertible Notes Payable [Member] | Common Stock [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Convertible, Number of Equity Instruments | | | | | | | | | 4,000 | | | 8,000,000 | | | | | | | | |
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares | | | | | | | | | $ 0.25 | | | | | | | | | | | |
July 2017 Convertible Note Offering [Member] | Convertible Notes Payable [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Unamortized Discount | | | | | | | | | | | | | $ 7,092,796 | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | | | | $ 7,201,000 | | | | | | | |
Debt Instrument, Term (Year) | | | | | | | | 3 years | | | | | 3 years | | | | | | | |
Debt Instrument, Face Amount Per Note | | | | | | | | $ 1,000 | | | | | | | | | | | | |
Debt Instrument, Convertible, Beneficial Conversion Feature | | | | | | | | | | | | | $ 3,142,605 | | | | | | | |
Debt Instrument, Convertible, Discount, Fair Value of Warrants | | | | | | | | | | | | | $ 3,950,191 | | | | | | | |
July 2017 Convertible Note Offering [Member] | Convertible Notes Payable [Member] | Common Stock [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Convertible, Number of Equity Instruments | | | | | | | | 4,000 | | | | | 28,804,000 | | | | | | | |
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares | | | | | | | | $ 0.25 | | | | | | | | | | | | |
July 2017 Convertible Note Offering [Member] | Promissory Note [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | | 6% | | | | | | | | | | | | |
March And July 2017 Convertible Note Offering [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Unamortized Discount | | | | | | | | | | 21,296 | | | | | | | | | | |
Interest Expense, Debt | | | | | | | | | | 21,307 | | | | | | | | | | |
Amortization of Debt Discount (Premium) | | | | | | | | | | 10,458 | | | | | | | | | | |
Interest Payable | | | | | | | | | | 93,222 | | | | | | | | | | |
March And July 2017 Convertible Note Offering [Member] | Convertible Notes Payable [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares | | | | | | | | | | | | | | | | $ 0.10 | | | | |
Debt Instrument, Extended Amount | | | | | | | | | | | | | | | | $ 197,000 | | | | |
Convertible Notes Payable, Total | | | | | | | | | | | | | | | | 1,257,000 | | | | |
March And July 2017 Convertible Note Offering [Member] | Convertible Debt [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Unamortized Discount | | | | | | | | | | | | | | | | 46,886 | | | | |
Interest Expense, Debt | | | | | | | | | | 7,564 | | | | | | | | | | |
Amortization of Debt Discount (Premium) | | | | | | | | | | 4,617 | | | | | | | | | | |
Interest Payable | | | | | | | | | | 70,919 | | | | | | | | | | |
Debt Instrument, Convertible, Beneficial Conversion Feature | | | | | | | | | | | | | | | | $ 33,490 | | | | |
The 6 % Convertible Note Payable Dated December 31, 2023 [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | | | | | | | | | 6% | | | | | |
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares | | | | | | | | | | | | | | | $ 0.05 | | | | | |
The 6 % Convertible Note Payable Dated December 31, 2023 [Member] | Three Investors [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | | | | | | $ 625,000 | | | | | |
The 6 % Convertible Note Payable Dated December 31, 2023 [Member] | Convertible Notes Payable [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | $ 250,000 | | | | | | | | | | |
The 6 % Convertible Note Payable Mature in December 2021 [Member] | Three Investors [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | | | | | | 375,000 | | | | | |
The 6 % Convertible Note Payable Mature in December 2023 [Member] | Three Investors [Member] | | | | | | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | | | | | | $ 250,000 | | | | | |