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Treasury Stock, Common [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Temporary increase to the consolidated borrower leverage ratio Debt Instrument, Covenant Compliance, Consolidated Borrower Leverage Ratio Debt Instrument, Covenant Compliance, Consolidated Borrower Leverage Ratio Net present value of operating lease liabilities Operating Lease, Liability Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Future minimum tenant operating Receipts remaining under sublease Lessor, Operating Lease, Payment to be Received Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Outside basis difference in investment Deferred Tax Assets, Step Up in Outside Basis Difference Deferred Tax Assets, Step Up in Outside Basis Difference Tax distributions to members Limited Liability Company (LLC) Members' Equity, Tax Distributions To Members Limited Liability Company (LLC) Members' Equity, Tax Distributions To Members Income before income tax expense Pre-tax earnings of the Company Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Change to APIC related to redemption of LLC Units Credit To Additional Paid In Capital Related To Redemption Of Units Credit To Additional Paid In Capital Related To Redemption Of Units Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Add: Net income impact from assumed redemption of all LLC Units to common stock Net Income (Loss) From Impact of Assumed Redemption of All LLC Units To Common Stock Net Income (Loss) From Impact of Assumed Redemption of All LLC Units To Common Stock Variable rate floor Debt Instrument, Variable Rate Floor Debt Instrument, Variable Rate Floor Sales and other tax payable Accrual 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Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Geographical [Domain] Geographical [Domain] Changes in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Income Taxes Income Tax, Policy [Policy Text Block] Entity Address, City or Town Entity Address, City or Town Operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Common Class B And Class C Common Class B And Class C [Member] Common Class B And Class C Concentration Risk Type [Axis] Concentration Risk Type [Axis] INVENTORIES, NET Inventory Disclosure [Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] RSUs Restricted Stock Units (RSUs) [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Impairment losses Impairment, Long-Lived Asset, Held-for-Use Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Cloud computing arrangements, net Capitalized Contract Cost, Net Right-of-use assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Outstanding at beginning of period (in shares) Outstanding at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Debt issuance costs Debt Issuance Costs, Net Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] State & local income taxes, net of federal income tax effect Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Class C Common Stock Common Class C [Member] Tax distributions to members Payments of Distributions to Affiliates Common stock, shares outstanding (in shares) Stockholders' equity, beginning balance (in shares) Stockholders' equity, ending balance (in shares) Common Stock, Shares, Outstanding Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Plan Name [Axis] Plan Name [Axis] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Document Information [Table] Document Information [Table] PEO PEO [Member] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Third-party extended service plan period Contract With Customer, Third-Party Extended Service Plan Period Contract With Customer, Third-Party Extended Service Plan Period Distributions to Members Incentive Distribution Policy, Managing Member or General Partner, Description [Policy Text Block] Non-cash investing and financing activities Noncash Investing and Financing Items [Abstract] Current tax benefit (expense) Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Supplemental cash flow information related to operating leases is as follows: Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract] Right-Of-Use Asset Obtained In Exchange For Lease Liability United States UNITED STATES Changes in assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Dividends or Other Earnings 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[Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Non-cash operating lease cost Operating Lease, Right-of-Use Asset, Periodic Reduction Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Provision for sales returns and allowances Balance at beginning of period Balance at end of period Contract with Customer, Refund Liability, Current City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accrued expenses and other current liabilities Total accrued expenses and other current liabilities Accrued Liabilities, Current Federal net operating loss carryforwards Deferred Tax Assets, Operating 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[Axis] Inventory [Axis] Long-term Purchase Commitment, Category of Item Purchased [Domain] Long-Term Purchase Commitment, Category of Item Purchased [Domain] Pre-tax earnings of Brilliant Earth Group, Inc. 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Swap Rate Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Plan Name [Domain] Plan Name [Domain] Cost not yet recognized, period for recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 2021 Incentive Award Plan 2021 Incentive Award Plan [Member] 2021 Incentive Award Plan Valuation allowance Deferred Tax Assets, Valuation Allowance Equity [Abstract] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Purchase commitments Purchase Obligation SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Auditor [Abstract] Auditor [Abstract] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Federal Current Federal Tax Expense (Benefit) Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Ownership [Domain] Ownership [Domain] Compensation Actually Paid vs. Total 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Aggregate Erroneous Compensation Amount Deferred tax (expense) benefit Deferred Income Taxes and Other Assets [Abstract] Arrangement Duration Trading Arrangement Duration Computer equipment Computer Equipment [Member] Deferred revenue Contract with Customer, Liability, Current Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Unamortized compensation cost Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Brilliant Earth Group, Inc. expected tax expense at statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Inventory, Current [Table] Inventory, Current [Table] Other Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item EQUITY-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Temporary increase to the consolidated borrower leverage ratio Debt Instrument, Covenant Compliance, Consolidated Borrower Leverage Ratio, Temporary Increased Amount Debt Instrument, Covenant Compliance, Consolidated Borrower Leverage Ratio, Temporary Increased Amount Assets Assets [Abstract] Long-term debt, net of debt issuance costs Long term net carrying amount Long-Term Debt, Excluding Current Maturities Underlying Security Market Price Change Underlying Security Market Price Change, Percent Vesting [Domain] Vesting [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Less: Income tax expense on net income attributable to NCI Income Tax Expense (Benefit), Portion Attributable To Noncontrolling Interest Income Tax Expense (Benefit), Portion Attributable To Noncontrolling Interest Loss on extinguishment of debt Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Stockholders’ equity Equity, Attributable to Parent [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Award vesting rights, percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Repurchases of common stock Treasury Stock, Value, Acquired, Cost Method Silicon Valley Bank Credit Agreement Silicon Valley Bank Credit Agreement [Member] Silicon Valley Bank Credit Agreement Operating lease liabilities Operating Lease, Liability, Noncurrent Entity Voluntary Filers Entity 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Other Current Liabilities Provision For Sales Returns Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] Conversion of LLC Units LLC Units Converted [Member] LLC Units Converted 2027 Recorded Unconditional Purchase Obligation, to be Paid, Year Two Interest expense, debt Interest Expense, Debt Operating lease not yet commenced term of contract (in years) Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract Name Trading Arrangement, Individual Name Award Type [Domain] Award Type [Domain] 2026 Lessee, Operating Lease, Liability, to be Paid, Year One Non-controlling interests attributable to Brilliant Earth, LLC Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Returns and allowances Contract with Customer, Refund Liability, Returns And Allowances Contract with Customer, Refund Liability, Returns And Allowances Leasehold improvements Leasehold Improvements [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Capital commitment Long-Term Purchase Commitment, Amount Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Debt instrument, face amount Debt Instrument, Face Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Revenue recognized Contract with Customer, Liability, Revenue Recognized Fixed charge coverage ratio Debt Instrument, Covenant 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Block] 2021 Employee Stock Purchase Plan Twenty Twenty One Employee Stock Purchase Plan [Member] Twenty Twenty One Employee Stock Purchase Plan ESPP Employee Stock [Member] ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Conversion of Class B to Class A common stock Stock Issued During Period, Value, Conversion of Convertible Securities Inventory [Domain] Inventory [Domain] Equity-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Long-term Purchase Commitment [Line Items] Long-Term Purchase Commitment [Line Items] Auditor Firm ID Auditor Firm ID Deferred tax assets, operating loss carryforwards, state and local Deferred Tax Assets, Operating Loss Carryforwards, State and Local Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost 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