Variable Interest Entities - Schedule of Variable Interest Entities (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Current assets	$ 183,944,005	$ 109,062,611
Current liabilities	119,288,435	111,367,255
Chesapeake Alternatives LLC [member]
Variable Interest Entity [Line Items]
Net income (loss)	4,987,879	1,807,229	$ 1,407,266
Chesapeake Alternatives LLC [member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Current assets	32,307,718	19,455,533
Non-current assets	3,367,360	22,384,663
Current liabilities	23,362,255	14,219,204
Non-current liabilities	768,573	1,169,989
Noncontrolling interests		350,206
Equity attributable to Green Thumb Industries Inc.	11,544,250	6,645,263
Revenues	19,724,513	16,056,521	13,783,876
Net income (loss) attributable to noncontrolling interests	411,162	699,624	1,407,266
Net income (loss) attributable to Green Thumb Industries Inc.	4,576,717	1,807,229
Illinois Disp LLC [member]
Variable Interest Entity [Line Items]
Net income (loss)	6,069,224	1,399,249	121,201
Illinois Disp LLC [member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Current assets	3,738,868	1,381,716
Non-current assets	3,657,392	3,083,659
Current liabilities	336,970	149,498
Non-current liabilities	461,926	137,736
Noncontrolling interests	3,173,683	2,089,071
Equity attributable to Green Thumb Industries Inc.	3,173,683	2,089,070
Revenues	18,693,964	5,857,946	643,898
Net income (loss) attributable to noncontrolling interests	3,034,612	(112,245)	60,601
Net income (loss) attributable to Green Thumb Industries Inc.	3,034,612	699,625	60,600
Other Non material VIEs [member]
Variable Interest Entity [Line Items]
Net income (loss)	1,214,120	(191,647)	(684,317)
Other Non material VIEs [member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Current assets	2,362,572	1,352,935
Non-current assets	2,281,839	2,534,297
Current liabilities	1,563,224	783,682
Non-current liabilities	783,356	855,440
Noncontrolling interests	267,289	(22,488)
Equity attributable to Green Thumb Industries Inc.	2,030,542	2,270,598
Revenues	10,011,729	3,516,164	4,555,543
Net income (loss) attributable to noncontrolling interests	639,179		(582,280)
Net income (loss) attributable to Green Thumb Industries Inc.	$ 574,941	$ (79,402)	$ (102,037)