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Share-based Payment Award, Options, Exercisable, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Grant Date Fair Value Inventory, gross Inventory, Gross Revenue from Contract with Customer Benchmark Revenue from Contract with Customer Benchmark [Member] Maximum shares issued upon exercise (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Maximum Shares Issued Upon Exercise Share-based Compensation Arrangement by Share-based Payment Award, Maximum Shares Issued Upon Exercise Exercise price of warrants (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Provision Contract with Customer, Refund Liability, Provision Contract with Customer, Refund Liability, Provision Class B And Class C Common Stock Class B And Class C Common Stock [Member] Class B And Class C Common Stock Options, vested and expected to vest (in shares) 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Entity Current Reporting Status Weighted average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Long-term Purchase Commitment [Table] Long-term Purchase Commitment [Table] Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Amortization of debt issuance costs Amortization of Debt Issuance Costs Restricted cash Restricted Cash, Current Counterparty Name [Axis] Counterparty Name [Axis] Payables and Accruals [Abstract] Allowance for inventory obsolescence Balance at beginning of period Balance at end of period Inventory Valuation Reserves Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Class A Common Class A [Member] Refund assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Total Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Number of shares issued in transaction (in shares) Sale of Stock, Number of Shares Issued in Transaction United States UNITED STATES Common stock, par or stated value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Current assets: Assets, Current [Abstract] Common stock reserved for issuances (in shares) Common Stock, Capital Shares Reserved for Future Issuance Votes per share Common Stock, Votes Per Share Common Stock, Votes Per Share Leases [Abstract] Income Taxes Income Tax, Policy [Policy Text Block] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Continuing Equity Owners Continuing Equity Owners [Member] Continuing Equity Owners Term Loan Agreement Term Loan Agreement [Member] Term Loan Agreement LLC Units Converted Into Class A And Class D Common Stock LLC Units Converted Into Class A And Class D Common Stock [Member] LLC Units Converted Into Class A And Class D Common Stock Entity Address, Postal Zip Code Entity Address, Postal Zip Code Schedule of Accrued Expenses And Other Current Liabilities Provision For Sales Returns Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Stock options exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Diluted (in shares) Weighted average shares of common stock outstanding, DILUTED (in shares) Weighted Average Number of Shares Outstanding, Diluted Founders Founders [Member] Founders Inventory received not billed Inventory Received Not Billed, Current Inventory Received Not Billed, Current Vested LLC Units that are exchangeable for common stock LLC Units Exchangeable For Common Stock [Member] LLC Units Exchangeable For Common Stock Income Taxes and Tax Receivable Agreement Income Tax Disclosure [Text Block] Over-Allotment Option Over-Allotment Option [Member] Weighted average shares of common stock outstanding: Weighted Average Number of Shares Outstanding, Basic [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Increase in deferred tax asset from step-up tax basis related to redemption of LLC Units and set-up of TRA liability Adjustments To Additional Paid In Capital, Deferred Tax Adjustment Adjustments To Additional Paid In Capital, Deferred Tax Adjustment Stockholders' and Members' Equity Stockholders' Equity Note Disclosure [Text Block] Statement of Cash Flows [Abstract] Class of Stock [Line Items] Class of Stock [Line Items] Entity Address, Address Line One Entity Address, Address Line One Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Entity Address, Address Line Two Entity Address, Address Line Two Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Interest rate during period Debt Instrument, Interest Rate During Period Principles of Consolidation and non-controlling interest Consolidation, Policy [Policy Text Block] Entity Shell Company Entity Shell Company Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Total current liabilities Liabilities, Current ESPP Employee Stock [Member] Class of Stock [Domain] Class of Stock [Domain] Ownership [Domain] Ownership [Domain] Current Fiscal Year End Date Current Fiscal Year End Date Second Tranche Term Loan Second Tranche Term Loan [Member] Second Tranche Term Loan Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement [Table] Statement [Table] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Other assets Increase (Decrease) in Other Noncurrent Assets Statistical Measurement [Axis] Statistical Measurement [Axis] 2023 Long-Term Debt, Maturity, Including Final Payment, Year One Long-Term Debt, Maturity, Including Final Payment, Year One Subsequent Event Subsequent Event [Member] Tax distributions to members Tax distributions to members Payments of Distributions to Affiliates NCI attributable to Brilliant Earth, LLC Stockholders' Equity Attributable to Noncontrolling Interest Inventories, Net Inventory, Policy [Policy Text Block] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Operating lease costs Operating Lease, Cost Operating ROU assets at cost Operating Lease, Right-of-Use Asset, before Accumulated Amortization Operating Lease, Right-of-Use Asset, before Accumulated Amortization Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value Inventory [Line Items] Inventory [Line Items] Long-Term Debt Long-term Debt [Text Block]