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The parent entity's interest in net assets of the subsidiary, expressed as a percentage, to be sold.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Note 6 - Convertible Notes (Details Textual)											1 Months Ended			3 Months Ended					9 Months Ended
Note 6 - Convertible Notes (Details Textual)	Dec. 16, 2019 USD ($) $ / shares shares	Nov. 27, 2019 USD ($) $ / shares	Nov. 18, 2019 USD ($) $ / shares shares	Oct. 30, 2019 USD ($) $ / shares shares	Oct. 23, 2019 USD ($) $ / shares	Aug. 01, 2019 USD ($) $ / shares shares	Jul. 12, 2019 USD ($) $ / shares	May 28, 2019 USD ($) $ / shares shares	Apr. 23, 2019 USD ($) $ / shares	Feb. 28, 2019 USD ($) $ / shares	Nov. 18, 2019 USD ($) $ / shares	Jul. 31, 2017 USD ($) $ / shares	Mar. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2017 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($)	Nov. 15, 2019	Mar. 31, 2019 USD ($)
Interest Payable, Current														$ 429,064					$ 429,064			$ 142,112
Amortization of Debt Discount (Premium)																			$ 741,912	$ 685,766
Debt Conversion, Converted Instrument, Shares Issued \| shares																			7,583,333
Gain (Loss) on Extinguishment of Debt, Total														(92,795)					$ (216,954)
Interest Expense, Debt, Excluding Amortization																			93,931	3,464,187
Induced Conversion of Convertible Debt Expense														127,059					127,059
GB Sciences, Nevada, LLC and GB Sciences Las Vegas, LLC [Member]
Noncontrolling Interest, Ownership Percentage to be Sold by Parent		75.00%																			75.00%
Warrants Issued in March 2017 Convertible Note Offering [Member]
Class of Warrant or Right, Issued \| shares													3,862,000					4,138,000
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right \| shares													1					1
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares													$ 0.60					$ 0.60
Warrants and Rights Outstanding, Term													3 years					3 years
Warrants Related to July 2017 Convertible Note Offering [Member]
Class of Warrant or Right, Issued \| shares																16,464,000	12,340,000
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right \| shares																1	1
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares												$ 0.65				$ 0.65	$ 0.65
Warrants and Rights Outstanding, Term																3 years	3 years
Debt Instrument, Convertible, Number of Warrants												4,000
Convertible Notes Payable [Member]
Debt Instrument, Convertible, Beneficial Conversion Feature																			829,736
Convertible Notes Payable [Member] \| March 2017 Convertible Note Offering [Member]
Debt Instrument, Face Amount													$ 965,500					$ 1,034,500
Debt Instrument, Term													3 years					3 years
Debt Instrument, Convertible, Beneficial Conversion Feature													$ 416,733					$ 487,957
Debt Instrument, Convertible, Discount, Fair Value of Warrants													$ 548,767					$ 480,236
Convertible Notes Payable [Member] \| March 2017 Convertible Note Offering [Member] \| Common Stock [Member]
Debt Instrument, Convertible, Number of Equity Instruments													3,862,000					4,138,000
Convertible Notes Payable [Member] \| July 2017 Convertible Note Offering [Member]
Debt Instrument, Face Amount																$ 4,116,000	$ 3,085,000
Debt Instrument, Term												3 years				3 years	3 years
Debt Instrument, Convertible, Beneficial Conversion Feature																$ 1,600,808	$ 1,541,797
Debt Instrument, Convertible, Discount, Fair Value of Warrants																$ 2,417,856	$ 1,532,335
Debt Instrument, Face Amount Per Note												$ 1,000
Convertible Notes Payable [Member] \| July 2017 Convertible Note Offering [Member] \| Common Stock [Member]
Debt Instrument, Convertible, Number of Equity Instruments												4,000				16,464,000	12,340,000
Debt Instrument, Convertible, Conversion Price \| $ / shares												$ 0.25
Convertible Notes Payable [Member] \| March 2017 and July 2017 Note Offerings [Member]
Long-term Debt, Gross														999,823					999,823
Debt Instrument, Unamortized Discount, Total														257,177					257,177
Interest Payable, Current														178,381					178,381
Interest Expense, Debt, Total																			364,575
Amortization of Debt Discount (Premium)																			307,752
Convertible Notes Payable [Member] \| The 8% Convertible Promissory Note Dated April 23, 2019 [Member]
Debt Instrument, Face Amount									$ 2,765,000					2,640,000					2,640,000
Debt Instrument, Interest Rate, Stated Percentage									8.00%
Debt Instrument, Convertible, Conversion Price \| $ / shares			$ 0.0375	$ 0.06					$ 0.17		$ 0.0375
Debt Instrument, Unamortized Discount, Total									$ 265,000
Interest Expense, Debt, Total																			164,150
Amortization of Debt Discount (Premium)																			109,870
Debt Conversion, Original Debt, Amount			$ 50,000	$ 75,000							$ 125,000
Debt Conversion, Converted Instrument, Shares Issued \| shares			1,333,333	1,250,000
Short-term Debt, Total														$ 2,497,686					$ 2,497,686
Debt Instrument, Debt Default, Interest Rate Penalty														15.00%					15.00%
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net, Total									440,000
Payments for Brokerage Fees									$ 175,000
Debt Instrument, Debt Default, Increase in Balance Outstanding, Percentage														10.00%					10.00%
Induced Conversion of Convertible Debt Expense			$ 62,353	$ 64,706										$ 127,059					$ 127,059
Promissory Note [Member]
Debt Instrument, Face Amount														6,020,230					6,020,230
Short-term Debt, Total														5,012,144					5,012,144
Promissory Note [Member] \| July 2017 Convertible Note Offering [Member]
Debt Instrument, Interest Rate, Stated Percentage												6.00%
Senior Secured Convertible Promissory Note [Member] \| The 8% Senior Secured Convertible Promissory Note Dated February 28, 2019 [Member]
Debt Instrument, Face Amount										$ 1,500,000
Debt Instrument, Convertible, Beneficial Conversion Feature					$ 92,796		$ 133,806			$ 176,471
Debt Instrument, Interest Rate, Stated Percentage							8.00%	8.00%		8.00%
Debt Instrument, Unamortized Discount, Total	$ 57,551					$ 9,579		$ 17,225						584,842					584,842
Interest Payable, Current														32,186					32,186
Interest Expense, Debt, Total																			61,286
Debt Conversion, Original Debt, Amount	120,000					110,000		170,000
Debt Instrument, Increase (Decrease), Net, Total	(62,449)	$ 30,000				(100,421)	$ 100,000	(152,775)
Short-term Debt, Total	$ 1,271,863	1,361,863			1,269,067	$ 1,361,863	1,338,057	$ 1,330,000						$ 687,021					$ 687,021
Proceeds from Related Party Debt							100,000
Debt Instrument, Increase, Accrued Interest							41,863
Gain (Loss) on Extinguishment of Debt, Total		$ 0			$ (92,796)		$ (124,158)
Debt Instrument, Debt Default, Interest Rate Penalty														10.00%					10.00%
Senior Secured Convertible Promissory Note [Member] \| The 8% Senior Secured Convertible Promissory Note Dated February 28, 2019 [Member] \| Minimum [Member]
Days to Cure Breach of Default After Notification From Lender														5					5
Senior Secured Convertible Promissory Note [Member] \| The 8% Senior Secured Convertible Promissory Note Dated February 28, 2019 [Member] \| Maximum [Member]
Days to Cure Breach of Default After Notification From Lender														10					10
Senior Secured Convertible Promissory Note [Member] \| The 8% Senior Secured Convertible Promissory Note Dated February 28, 2019 [Member] \| GB Sciences, Nevada, LLC [Member] \| Collateral Pledged [Member]
Noncontrolling Interest, Ownership Percentage by Parent										100.00%
Senior Secured Convertible Promissory Note [Member] \| The 8% Senior Secured Convertible Promissory Note Dated February 28, 2019 [Member] \| Common Stock [Member]
Debt Instrument, Convertible, Number of Equity Instruments										8,823,529
Debt Instrument, Convertible, Conversion Price \| $ / shares	$ 0.04	$ 0.04			$ 0.08	$ 0.11	$ 0.11	$ 0.17		$ 0.17
Debt Conversion, Converted Instrument, Shares Issued \| shares	3,000,000					1,000,000		1,000,000
Senior Secured Convertible Promissory Note [Member] \| The Amended 8% Senior Secured Convertible Promissory Note Dated February 28, 2019 [Member]
Debt Instrument, Face Amount														$ 1,271,863					$ 1,271,863
Interest Expense, Debt, Total																			89,624
Amortization of Debt Discount (Premium)																			62,354
Short-term Debt, Total														$ 687,021					687,021
Interest Expense, Debt, Excluding Amortization																			$ 27,270