Note 1 - Background and Significant Accounting Policies (Policies)	3 Months Ended
Jun. 30, 2019
Policy Text Block [Abstract]
Basis of Presentation	*Basis of Presentation* The accompanying unaudited interim condensed consolidated financial statements of GB Sciences, Inc. (the “Company,” “We” or “Us”) have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulations S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the periods presented are not necessarily indicative of the results that may be expected for the year ending March 31, 2020. The balance sheet at March 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U.S. GAAP for complete financial statements. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s annual report on Form 10-K for the year ended March 31, 2019.
Principles of Consolidation	*Principles of Consolidation* We prepare our consolidated financial statements in accordance with generally accepted accounting principles (GAAP) for the United States of America. Our consolidated financial statements include all operating divisions and majority-owned subsidiaries, reported as a single operating segment, for which we maintain controlling interests. Intercompany accounts and transactions have been eliminated in consolidation. The ownership interest of noncontrolling participants in subsidiaries that are not wholly owned is included as a separate component of equity. The noncontrolling participants’ share of the net loss is included as “Net loss attributable to noncontrolling interest” on the unaudited consolidated statements of operations.
Use of Estimates	*Use of Estimates* The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. The Company regularly evaluates estimates and assumptions related to allowances for doubtful accounts, inventory valuation, valuation of initial right-of-use assets and corresponding lease liabilities, valuation of beneficial conversion features in convertible debt, stock-based compensation expense, purchased intangible asset valuations, deferred income tax asset valuation allowances, uncertain tax positions, litigation and other loss contingencies. These estimates and assumptions are based on current facts, historical experience and various other factors that the Company believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the recording of costs and expenses that are not readily apparent from other sources. The actual results the Company experiences may differ materially and adversely from these estimates.
Reclassifications	*Reclassifications* Certain reclassifications have been made to the comparative period amounts in order to conform to the current period presentation. Specifically, the current and long-term capital lease obligations recorded in the consolidated balance sheet as of March 31, 2019 have been reclassified to conform to the current period presentation as finance lease obligations, current, and finance lease obligations, long term. The reclassifications had no effect on the reported financial position, results of operations or cash flows of the Company.
Long-Lived Assets	*Long-Lived Assets* Property and equipment comprise a significant portion of our total assets. We evaluate the carrying value of property and equipment if impairment indicators are present or if other circumstances indicate that impairment may exist under authoritative guidance. The annual testing date is March 31. When management believes impairment indicators may exist, projections of the undiscounted future cash flows associated with the use of and eventual disposition of property and equipment are prepared. If the projections indicate that the carrying value of the property and equipment are not recoverable, we reduce the carrying values to fair value. These impairment tests are heavily influenced by assumptions and estimates that are subject to change as additional information becomes available. No indicators of impairment were identified by the Company as of March 31, 2019.
Inventory	*Inventory* We value our inventory at the lower of the actual cost of our inventory, as determined using the first-in, first-out method, or its current estimated market value. We periodically review our physical inventory for excess, obsolete, and potentially impaired items and reserve accordingly. Our reserve estimate for excess and obsolete inventory is based on expected future use.
Beneficial Conversion Feature of Convertible Notes Payable	*Beneficial Conversion Feature of Convertible Notes Payable* The Company accounts for convertible notes payable in accordance with the guidelines established by the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”) Topic 470-20, Debt with Conversion and Other Options and Emerging Issues Task Force (“EITF”) 00-27, “Application of Issue No. 98-5 to Certain Convertible Instruments”. A beneficial conversion feature (“BCF”) exists on the date a convertible note is issued when the fair value of the underlying common stock to which the note is convertible into is in excess of the remaining unallocated proceeds of the note after first considering the allocation of a portion of the note proceeds to the fair value of any attached equity instruments, if any related equity instruments were granted with the debt. In accordance with this guidance, the BCF of a convertible note is measured by allocating a portion of the note's proceeds to the warrants, if applicable, and as a reduction of the carrying amount of the convertible note equal to the intrinsic value of the conversion feature, both of which are credited to additional paid-in-capital. The Company calculates the fair value of warrants issued with the convertible notes using the Black-Scholes valuation model and uses the same assumptions for valuing any employee options in accordance with ASC Topic 718 Compensation – Stock Compensation. The only difference is that the contractual life of the warrants is used. The value of the proceeds received from a convertible note is then allocated between the conversion features and warrants on a relative fair value basis. The allocated fair value is recorded in the financial statements as a debt discount (premium) from the face amount of the note and such discount is amortized over the expected term of the convertible note (or to the conversion date of the note, if sooner) and is charged to interest expense.
Revenue Recognition	*Revenue Recognition* The FASB issued Accounting Standards Codification (“ASC”) 606 as guidance on the recognition of revenue from contracts with customers. Revenue recognition depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance also requires disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The guidance permits two methods of adoption: retrospectively to each prior reporting period presented, or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the cumulative catch-up transition method). The Company adopted the guidance on April 1, 2018 and applied the cumulative catch-up transition method. The Company’s only current revenue source is from sales of cannabis, a distinct physical good. Under ASC 606, the Company is required to separately identify each performance obligation resulting from its contracts from customers, which may be a good or a service. A contract may contain one or more performance obligations. All of the Company’s contracts with customers, past and present, contain only a single performance obligation, the delivery of distinct physical goods. Because fulfillment of the company’s performance obligation to the customer under ASC 606 results in the same timing of revenue recognition as under the previous guidance (i.e. revenue is recognized upon delivery of physical goods), the Company did not record any material adjustment to report the cumulative effect of initial application of the guidance.
Loss Per Share	*Loss per Share* The Company’s basic loss per share has been calculated using the weighted average number of common shares outstanding during the period. The Company had 138,671,617 and 79,481,521 potentially dilutive common shares at June 30, 2019 and 2018, respectively. However, such common stock equivalents were not included in the computation of diluted net loss per share as their inclusion would have been anti-dilutive.
Recent Accounting Pronouncements	*Recent Accounting Pronouncements* Recently Adopted Standards In February 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-02, Leases (Topic 842), (the "New Lease Standard"). This standard requires leases, other than short-term, to be recognized on the balance sheet as a lease liability and a corresponding right-of-use asset. Lease payments include fixed payments, variable payments based on an index or rate, reasonably certain purchase options, termination penalties, and others as required by the standard. Lease payments do not include variable lease payments other than those that depend on an index or rate, any guarantee by the lessee of the lessor’s debt, or any amount allocated to non-lease components. This standard is effective for interim and annual reporting periods beginning after December 15, 2018 and the Company adopted the standard as of April 1, 2019. The Company also elected the package of practical expedients, which among other things, does not require reassessment of lease classification. The Company adopted the New Lease Standard using the modified retrospective transition approach as of the effective date as permitted by the amendments in ASU 2018-11, "Targeted Improvements - Leases (Topic 842)." Under this method, the cumulative effect adjustment to the opening balance of retained earnings is recognized at the adoption date. As a result, the Company was not required to adjust its comparative period financial information for effects of the standard or make the new required lease disclosures for periods before the date of adoption on April 1, 2019. The Company's consolidated balance sheet was affected by this standard, but the consolidated statement of operations and consolidated statement of cash flows were not significantly impacted. The most significant change to the consolidated balance sheet upon adoption on April 1, 2019 relates to the recognition of new right-of-use (ROU) assets of $182,624, net of accumulated amortizations, and operating liabilities of $190,173 at the date of adoption. The Company's accounting for finance leases remains substantially unchanged. In June 2018, the FASB issued ASU 2018-07, “Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting” (“ASU 2018-07”). ASU No 2018-07 expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. The guidance also specifies that Topic 718 applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in a grantor’s own operations by issuing share-based payment awards. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is effective for the Company as of April 1, 2019. The Company determined that all share-based payments were settled as of the date of the adoption, so there was no impact on the Company's consolidated financial statements. All other newly issued accounting pronouncements but not yet effective have been deemed either immaterial or not applicable.

Note 1 - Background and Significant Accounting Policies (Policies)

3 Months Ended

Jun. 30, 2019

Basis of Presentation

The accompanying unaudited interim condensed consolidated financial statements of GB Sciences, Inc. (the “Company,” “We” or “Us”) have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulations S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the periods presented are not necessarily indicative of the results that may be expected for the year ending March 31, 2020. The balance sheet at March 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U.S. GAAP for complete financial statements. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s annual report on Form 10-K for the year ended March 31, 2019.

Principles of Consolidation

Principles of Consolidation

We prepare our consolidated financial statements in accordance with generally accepted accounting principles (GAAP) for the United States of America. Our consolidated financial statements include all operating divisions and majority-owned subsidiaries, reported as a single operating segment, for which we maintain controlling interests. Intercompany accounts and transactions have been eliminated in consolidation. The ownership interest of noncontrolling participants in subsidiaries that are not wholly owned is included as a separate component of equity. The noncontrolling participants’ share of the net loss is included as “Net loss attributable to noncontrolling interest” on the unaudited consolidated statements of operations.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. The Company regularly evaluates estimates and assumptions related to allowances for doubtful accounts, inventory valuation, valuation of initial right-of-use assets and corresponding lease liabilities, valuation of beneficial conversion features in convertible debt, stock-based compensation expense, purchased intangible asset valuations, deferred income tax asset valuation allowances, uncertain tax positions, litigation and other loss contingencies. These estimates and assumptions are based on current facts, historical experience and various other factors that the Company believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the recording of costs and expenses that are not readily apparent from other sources. The actual results the Company experiences may differ materially and adversely from these estimates.

Reclassifications

Reclassifications

Certain reclassifications have been made to the comparative period amounts in order to conform to the current period presentation. Specifically, the current and long-term capital lease obligations recorded in the consolidated balance sheet as of March 31, 2019 have been reclassified to conform to the current period presentation as finance lease obligations, current, and finance lease obligations, long term. The reclassifications had no effect on the reported financial position, results of operations or cash flows of the Company.

Long-Lived Assets

Long-Lived Assets

Property and equipment comprise a significant portion of our total assets. We evaluate the carrying value of property and equipment if impairment indicators are present or if other circumstances indicate that impairment may exist under authoritative guidance. The annual testing date is March 31. When management believes impairment indicators may exist, projections of the undiscounted future cash flows associated with the use of and eventual disposition of property and equipment are prepared. If the projections indicate that the carrying value of the property and equipment are not recoverable, we reduce the carrying values to fair value. These impairment tests are heavily influenced by assumptions and estimates that are subject to change as additional information becomes available. No indicators of impairment were identified by the Company as of March 31, 2019.

Inventory

Inventory

We value our inventory at the lower of the actual cost of our inventory, as determined using the first-in, first-out method, or its current estimated market value. We periodically review our physical inventory for excess, obsolete, and potentially impaired items and reserve accordingly. Our reserve estimate for excess and obsolete inventory is based on expected future use.

Beneficial Conversion Feature of Convertible Notes Payable

Beneficial Conversion Feature of Convertible Notes Payable

The Company accounts for convertible notes payable in accordance with the guidelines established by the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”) Topic 470-20, Debt with Conversion and Other Options and Emerging Issues Task Force (“EITF”) 00-27, “Application of Issue No. 98-5 to Certain Convertible Instruments”. A beneficial conversion feature (“BCF”) exists on the date a convertible note is issued when the fair value of the underlying common stock to which the note is convertible into is in excess of the remaining unallocated proceeds of the note after first considering the allocation of a portion of the note proceeds to the fair value of any attached equity instruments, if any related equity instruments were granted with the debt. In accordance with this guidance, the BCF of a convertible note is measured by allocating a portion of the note's proceeds to the warrants, if applicable, and as a reduction of the carrying amount of the convertible note equal to the intrinsic value of the conversion feature, both of which are credited to additional paid-in-capital. The Company calculates the fair value of warrants issued with the convertible notes using the Black-Scholes valuation model and uses the same assumptions for valuing any employee options in accordance with ASC Topic 718 Compensation – Stock Compensation. The only difference is that the contractual life of the warrants is used.

The value of the proceeds received from a convertible note is then allocated between the conversion features and warrants on a relative fair value basis. The allocated fair value is recorded in the financial statements as a debt discount (premium) from the face amount of the note and such discount is amortized over the expected term of the convertible note (or to the conversion date of the note, if sooner) and is charged to interest expense.

Revenue Recognition

Revenue Recognition

The FASB issued Accounting Standards Codification (“ASC”) 606 as guidance on the recognition of revenue from contracts with customers. Revenue recognition depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance also requires disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The guidance permits two methods of adoption: retrospectively to each prior reporting period presented, or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the cumulative catch-up transition method). The Company adopted the guidance on April 1, 2018 and applied the cumulative catch-up transition method.

The Company’s only current revenue source is from sales of cannabis, a distinct physical good. Under ASC 606, the Company is required to separately identify each performance obligation resulting from its contracts from customers, which may be a good or a service. A contract may contain one or more performance obligations. All of the Company’s contracts with customers, past and present, contain only a single performance obligation, the delivery of distinct physical goods. Because fulfillment of the company’s performance obligation to the customer under ASC 606 results in the same timing of revenue recognition as under the previous guidance (i.e. revenue is recognized upon delivery of physical goods), the Company did not record any material adjustment to report the cumulative effect of initial application of the guidance.

Loss Per Share

Loss per Share

The Company’s basic loss per share has been calculated using the weighted average number of common shares outstanding during the period. The Company had 138,671,617 and 79,481,521 potentially dilutive common shares at June 30, 2019 and 2018, respectively. However, such common stock equivalents were not included in the computation of diluted net loss per share as their inclusion would have been anti-dilutive.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Recently Adopted Standards

In February 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-02, Leases (Topic 842), (the "New Lease Standard"). This standard requires leases, other than short-term, to be recognized on the balance sheet as a lease liability and a corresponding right-of-use asset.

Lease payments include fixed payments, variable payments based on an index or rate, reasonably certain purchase options, termination penalties, and others as required by the standard. Lease payments do not include variable lease payments other than those that depend on an index or rate, any guarantee by the lessee of the lessor’s debt, or any amount allocated to non-lease components. This standard is effective for interim and annual reporting periods beginning after December 15, 2018 and the Company adopted the standard as of April 1, 2019. The Company also elected the package of practical expedients, which among other things, does not require reassessment of lease classification.

The Company adopted the New Lease Standard using the modified retrospective transition approach as of the effective date as permitted by the amendments in ASU 2018-11, "Targeted Improvements - Leases (Topic 842)." Under this method, the cumulative effect adjustment to the opening balance of retained earnings is recognized at the adoption date. As a result, the Company was not required to adjust its comparative period financial information for effects of the standard or make the new required lease disclosures for periods before the date of adoption on April 1, 2019.

The Company's consolidated balance sheet was affected by this standard, but the consolidated statement of operations and consolidated statement of cash flows were not significantly impacted. The most significant change to the consolidated balance sheet upon adoption on April 1, 2019 relates to the recognition of new right-of-use (ROU) assets of $182,624, net of accumulated amortizations, and operating liabilities of $190,173 at the date of adoption. The Company's accounting for finance leases remains substantially unchanged.

In June 2018, the FASB issued ASU 2018-07, “Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting” (“ASU 2018-07”). ASU No 2018-07 expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. The guidance also specifies that Topic 718 applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in a grantor’s own operations by issuing share-based payment awards. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and is effective for the Company as of April 1, 2019. The Company determined that all share-based payments were settled as of the date of the adoption, so there was no impact on the Company's consolidated financial statements.

All other newly issued accounting pronouncements but not yet effective have been deemed either immaterial or not applicable.