CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($)	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Text Block [Abstract]
SALES REVENUE	$ 910,676	$ 1,315,284
COST OF GOODS SOLD	(624,369)	(580,565)
GROSS PROFIT	286,307	734,719
GENERAL AND ADMINISTRATIVE EXPENSES	2,267,388	4,463,881
LOSS FROM OPERATIONS	(1,981,081)	(3,729,162)
OTHER INCOME (EXPENSE)
Interest expense	(500,410)	(1,720,182)
Other income	0	97,861
Total other expense	(500,410)	(1,622,321)
NET LOSS BEFORE INCOME TAX EXPENSE	(2,481,491)	(5,351,483)
Income tax expense	(57,392)	0
NET LOSS	(2,538,883)	(5,351,483)
Net loss attributable to non-controlling interest	(132,216)	(184,144)
NET LOSS ATTRIBUTABLE TO GB SCIENCES, INC.	(2,406,667)	(5,167,339)
Net loss attributable to common stockholders	$ (2,406,667)	$ (5,167,339)
Net loss per share - basic and diluted	$ (0.01)	$ (0.03)
Weighted average common shares outstanding - basic and diluted	244,036,524	175,274,248