Cover [Abstract] Document Information [Table] Document Information [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Current Reporting Status Entity Shell Company Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Entity Address, State or Province Entity Common Stock, Shares Outstanding Title of 12(g) Security Document Annual Report Document Transition Report Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Interactive Data Current Entity Public Float ICFR Auditor Attestation Flag Class of Stock [Axis] Class of Stock [Domain] Subordinate Voting Shares [Member] Subordinate Voting Shares [Member] Subordinate Voting Shares [member] Subordinate voting shares [member] Super Voting Shares [Member] Super Voting Shares [Member] Super Voting Shares [member] Super voting shares [member] Multiple Converted Voting Shares [Member] Multiple Voting Shares [Member] Multiple Converted Voting Shares. Statement of Financial Position [Abstract] Statement [Table] Multiple Voting Shares [Member] Multiple Voting Shares [Member] Multiple Voting Shares [member] Multiple voting shares [member] Statement [Line Items] Assets [Abstract] ASSETS Assets, Current [Abstract] Current Assets: Long-term Investments Investments Beginning balance Ending balance Investment In Associate Investment in Associate Investment in associate. Accounts Receivable, after Allowance for Credit Loss, Noncurrent, Total Note Receivable Intangible Assets, Net (Excluding Goodwill) Intangible Assets, Net Intangible Assets Net Goodwill Goodwill Balance at beginning Balance at end Deposits And Other Assets Noncurrent Deposits and Other Assets Deposits and other assets noncurrent Assets TOTAL ASSETS Operating Lease, Right-of-Use Asset Right of Use Assets, Net Operating lease right of use asset Property, Plant and Equipment, Net Property and Equipment, Net Beginning balance Ending balance Assets, Current Total Current Assets Current assets Other Assets, Current Other Current Assets Prepaid Expense, Current Prepaid Expenses Inventory, Net Inventories Total Inventories Accounts Receivable, after Allowance for Credit Loss, Current, Total Accounts Receivable Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and Cash Equivalents Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] SHARE HOLDERS' EQUITY Common Stock Value Issued Share Capital Common stock value issued. Contributed Surplus Contributed Surplus Contributed surplus. Deferred Share Issuances Deferred Share Issuances Deferred share issuances during the current period. Accumulated Deficit Accumulated Deficit Accumulated deficit. Stockholders' Equity Attributable to Parent Equity of Green Thumb Industries Inc. Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interests Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest TOTAL SHAREHOLDERS' EQUITY Ending balance Beginning balance Liabilities TOTAL LIABILITIES Commitments and Contingencies COMMITMENTS AND CONTINGENCIES Liabilities [Abstract] LIABILITIES Liabilities, Current [Abstract] Current Liabilities: Accounts Payable, Current Accounts Payable Accrued Liabilities, Current Accrued Liabilities Notes Payable, Current Current Portion of Notes Payable Less: current portion of notes payable Operating Lease, Liability, Current Current Portion of Lease Liabilities Liability For Acquisition Of Noncontrolling Interest Liability for Acquisition of Noncontrolling Interest Liability for acquisition of noncontrolling interest Business Combination, Contingent Consideration, Liability, Current Contingent Consideration Payable Accrued Income Taxes, Current Income Tax Payable Liabilities, Current Total Current Liabilities Current liability Current liabilities Liabilities, Noncurrent [Abstract] Long-Term Liabilities: Operating Lease, Liability, Noncurrent Lease Liabilities, Net of Current Portion Notes Payable, Noncurrent Notes Payable, Net of Current Portion and Debt Discount Notes payable, net of current portion Business Combination, Contingent Consideration, Liability, Noncurrent Contingent Consideration Payable Non Current Contingent consideration Product Warranty Accrual, Noncurrent Warrant Liability Deferred Income Taxes and Other Liabilities, Noncurrent Deferred Income Taxes Liabilities and Equity TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Common Stock, Shares, Issued Common Stock, Shares, Issued Common Stock, Shares, Outstanding Beginning balance Ending balance Common Stock, Shares, Outstanding Common Stock Share Authorized Common Stock, Shares Authorized Common stock share authorized. Income Statement [Abstract] Gross Profit Gross Profit Operating Expenses [Abstract] Expenses: Selling, General and Administrative Expense Selling, General, and Administrative Operating Expenses Total Expenses Operating Income (Loss) Income (Loss) From Operations (Loss) Income from operations Other Nonoperating Income (Expense) [Abstract] Other Income (Expense): Other Nonoperating Income (Expense) Other Income (Expense), net Total Other Income (Expense) Interest Income, Other Interest Income, net Interest Expense Interest Expense, net Nonoperating Income (Expense) Total Other Income (Expense) Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income (Loss) Before Provision for Income Taxes And Non-Controlling Interest Income/(Loss) before Income Taxes Income Tax Expense (Benefit) Provision For Income Taxes Income Taxes Total Income Tax Expense Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Net Income (Loss) Before Non-Controlling Interest Net (loss) income Revenues Revenues, net of discounts Revenues Cost of Goods and Services Sold Cost of Goods Sold, net Net Income (Loss) Attributable to Noncontrolling Interest Net Income Attributable to Non-Controlling Interest Net income (loss) attributable to non-controlling interest Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable To Green Thumb Industries Inc. Net income (loss) attributable to Green Thumb Industries Inc. Net income (loss) Net Income (loss) attributable to Green Thumb Industries Inc. Earnings Per Share, Basic Net Income (Loss) per share—basic Net Income (loss) per share – basic Earnings Per Share, Diluted Net Income (Loss) per share—diluted Net Income (loss) per share – diluted Weighted Average Number of Shares Outstanding, Basic Weighted average number of shares outstanding—basic Weighted average number of common shares outstanding - basic Weighted Average Number of Shares Outstanding, Diluted Weighted average number of shares outstanding—diluted Weighted average number of common shares outstanding - diluted Statement of Stockholders' Equity [Abstract] Adoption Of ASC Eight Four Two Leases Adoption of ASC 842, Leases Adoption of ASC eight four two leases. Noncontrolling Interests Adjustment For Change In Ownership Noncontrolling interests adjustment for change in ownership Non controlling interests adjustment for change in ownership. Distribution From Limited Liability Company Unit Holders Contributions from limited liability company unit holders Distribution from limited liability company unit holders. Issuance Of Shares Under Business Combinations And Investments Issuance of shares under business combinations and investments Issuance of shares under business combinations and investments. Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Issuance of shares for redemption of noncontrolling interests Issuance of shares for redemption of noncontrolling interests APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition Stock based compensation Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid Distributions to third party and limited liability company unit holders Contingent Consideration And Other Adjustments To Purchase Accounting Contingent consideration and other adjustments to purchase accounting. Deferred Share Issuance Deferred share issuances Deferred share issuances during the current period. Adjustments to Additional Paid in Capital, Warrant Issued Issueance of warrants Stock Issued During Period Value Distribution Of Contingent Consideration Distribution of contingent consideration Stock issued during period value distribution of contingent consideration. Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Distributions to limited liability company unit holders Reduction of Non controlling interest Stock Issued During Period Value Stock Options and Warrants Exercised Exercise of options and warrants Issuance of shares upon exercise of options and warrants Stock issued during period value stock options and warrants exercised. Shares withheld in lieu of cash Shares withheld in lieu of cash Shares withheld in lieu of cash. Conversion of Stock, Amount Converted Conversion of notes payable into share capital Stock Issued During Period Value Reverse takeover Reverse takeover Stock Issued During Period Value Reverse takeover. Stock Issued During Period, Value, Issued for Services Shares issued pursuant to private placement, net of issuance costs and issuance of options as settlement of services provided Issuance of shares for professional fees Stock issued during period, value, issued for services Stock Issued During Period, Value, Acquisitions Purchase accounting adjustments for 2017 acquisitions Issuance of shares under business combinations and investments, Value Issuance of shares under business combinations and investments, Value Conversion Of Exchange Note Conversion of exchange note Conversion of exchange note. Noncontrolling Interest Control acquired through management service agreement Control acquired through management service agreement Noncontrolling Interest Control acquired through management service agreement. Noncontrolling Interest, Increase from Business Combination Noncontrolling interest under business combination Issuance of Stock and Warrants for Services or Claims Shares issued in consideration of professional fees Stock Issued During Period Value Issued For Exercise of broker options Issuance of shares upon Exercise of broker options Stock Issued During Period Value Issued For Exercise of broker options. Distributions of investments Distributions of investments Distributions of investments. Issuance Of Shares Upon Fundraise Transaction August Twenty Eighteen Net Of Costs Issuance of shares upon fundraise transaction, August 2018, net of costs Issuance of shares upon fundraise transaction august twenty eighteen net of costs. Issuance Of Shares Upon Fundraise Transaction October Twenty Eighteen Net Of Costs Issuance of shares upon fundraise transaction, October 2018, net of costs Issuance of shares upon fundraise transaction october twenty eighteen net of costs. Stock Issued During Period, Value, New Issues Issuance of deferred shares Stock Issued During Period, Value, New Issues Equity Components [Axis] Equity Component [Domain] Shares To Be Issued [Member] Shares To Be Issued [Member] Shares to be issued [member] Contributed Surplus [Member] Contributed Surplus [Member] Contributed surplus [member] Deferred Share Issuance [Member] Deferred Share Issuance [Member] Deferred share issuance [member] Retained Earnings [Member] Retained Earnings [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Common Stock [Member] Share Capital [Member] Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] CASH FLOW FROM OPERATING ACTIVITIES Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Bad Debt Expense Bad debt expense Bad debt expense. Deferred Income Taxes and Tax Credits Deferred income taxes Depreciation, Depletion and Amortization Depreciation and amortization Amortization Of Operating Lease Assets Amortization of operating lease assets Amortization of operating lease assets. Share-based Payment Arrangement, Noncash Expense, Total Stock based compensation Changes In Value Of Liabilities Related To Put Option And Purchase Of Noncontrolling Interests Changes in value of liabilities related to put option and purchase of noncontrolling interests Changes in value of liabilities related to put option and purchase of noncontrolling interests. Interest On Contingent Consideration Payable And Acquisition Liabilities Interest on contingent consideration payable and acquisition liabilities Interest on contingent consideration payable and acquisition liabilities. Increase Decrease In Fair Value Of Convertible Note Receivable Decrease in fair value of note receivable Increase decrease in fair value of convertible note receivable. Amortization of Debt Issuance Costs and Discounts Amortization of debt discount Amortization of Debt Issuance Costs and Discounts Gain (Loss) on Disposition of Property Plant Equipment Loss on disposal of property and equipment Gain (Loss) on Investments Loss from investment in associate Increase Decrease In Fair Value Of Investments Decrease (increase) in fair value of investments Amount of increase (decrease) in fair value of investments. Increase In Fair Value Of Warrants Increase (decrease) in fair value of warrant liability Increase In Fair Value Of Warrants Adjustment for Deferred Rent Deferred rent Adjustment for Deferred Rent Increase Decrease in fair value conversion feature Decrease in fair value conversion feature Increase Decrease in fair value conversion feature. Paid-in-Kind Interest Interest on convertible note payable Adjustment for Gain on settlement of contingent consideration Gain on settlement of contingent consideration Adjustment for Gain on settlement of contingent consideration. Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Increase Decrease In Inventory Inventories Increase decreaseiIn inventory. Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase Decrease In Deposits And Other Assets Deposits and other assets Increase decrease in deposits and other assets. Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accrued Liabilities Accrued liabilities Increase Decrease In Operating Lease Liabilities Operating lease liabilities Increase decrease in operating lease liabilities. Increase (Decrease) in Income Taxes Payable Income tax payable Net Cash Provided by (Used in) Operating Activities NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] CASH FLOW FROM INVESTING ACTIVITIES Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Payments to acquire property plant and equipment Proceeds from Sale of Productive Assets Proceeds from disposal of assets Payments to Acquire Businesses, Net of Cash Acquired Purchase of businesses, net of cash acquired Net Cash Provided by (Used in) Investing Activities NET CASH USED IN INVESTING ACTIVITIES Payments to Acquire Debt Securities, Available-for-sale Investments in securities Proceeds from Sale of Debt Securities, Available-for-sale Proceeds from repayment or sale of securities Payments To Acquire Interest In Associates Investment in associates Payments To Acquire Interest In Associates. Payments to Acquire Loans Receivable Advances to related parties Proceeds from Sale of Loans Receivable Repayments from related parties Payments to Acquire Notes Receivable Issuance of notes receivable Payment to Consolidation of variable interest entities Consolidation of variable interest entities Payment to Consolidation of variable interest entities. Payments To Acquire licenses Purchases of licenses Payments To Acquire licenses. Repayment of Notes Receivable from Related Parties Repayment of note receivable Net Cash Provided by (Used in) Financing Activities [Abstract] CASH FLOW FROM FINANCING ACTIVITIES Contributions From Limited Liability Company Unit Holders Contributions from limited liability company unit holders Contributions from limited liability company unit holders. Distributions To Third Parties And Limited Liability Company Unit Holders Distributions to third parties and limited liability company unit holders Distributions to third parties and limited liability company unit holders. Repayments of Notes Payable Principal repayment of notes payable Net Cash Provided by (Used in) Financing Activities NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES Proceeds From Exercise Of Options And Warrants Proceeds from exercise of options and warrants Proceeds from exercise of options and warrants. Proceeds from Notes Payable Proceeds from issuance of notes payable Payments to Noncontrolling Interests Payment for purchase of noncontrolling interest Payment for change in ownership interests of subsidiary Payment for change in ownership interests of subsidiary Payment for change in ownership interests of subsidiary.