CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Text Block [Abstract]
SALES REVENUE	$ 3,454,552	$ 2,510,364
COST OF GOODS SOLD	(3,246,097)	(782,727)
GROSS PROFIT	208,455	1,727,637
GENERAL AND ADMINISTRATIVE EXPENSES	15,802,783	19,552,288
LOSS FROM OPERATIONS	(15,594,328)	(17,824,651)
OTHER INCOME (EXPENSE)
Interest Expense	(5,191,259)	(5,176,361)
Other expense	(3,368,555)	(158,213)
Total other expense	(8,559,814)	(5,334,574)
NET LOSS BEFORE INCOME TAX EXPENSE	(24,154,142)	(23,159,225)
Income tax expense	(526,145)	0
NET LOSS	(24,680,287)	(23,159,225)
Net loss attributable to non-controlling interest	(1,027,122)	(185,035)
NET LOSS ATTRIBUTABLE TO GB SCIENCES, INC.	(23,653,165)	(22,974,190)
Net loss attributable to common stockholders	$ (26,514,601)	$ (22,974,190)
Net loss per share - basic and diluted	$ (0.13)	$ (0.17)
Weighted average common shares outstanding - basic and diluted	209,537,769	132,934,141