The amount of asset retirement obligation, inflation rate.

No definition available.

Name:	bgl_AssetRetirementObligationInflationRate
Namespace Prefix:	bgl_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of asset retirement obligation, market risk premium.

+ References

No definition available.

+ Details

Name:	bgl_AssetRetirementObligationMarketRiskPremium
Namespace Prefix:	bgl_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period between remaining term.

+ References

No definition available.

+ Details

Name:	bgl_AssetRetirementObligationRemainingTerm
Namespace Prefix:	bgl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Gold production over life of mine mesaurement.

+ References

No definition available.

+ Details

Name:	bgl_GoldProductionOverLifeOfMineMesaurement
Namespace Prefix:	bgl_
Data Type:	dtr:weightItemType
Balance Type:	na
Period Type:	instant

- Definition

long-term gold prices

+ References

No definition available.

+ Details

Name:	bgl_LongtermGoldPrices
Namespace Prefix:	bgl_
Data Type:	dtr:weightItemType
Balance Type:	na
Period Type:	instant

- Definition

Ore processed measurement.

+ References

No definition available.

+ Details

Name:	bgl_OreProcessedMeasurement
Namespace Prefix:	bgl_
Data Type:	dtr:weightItemType
Balance Type:	na
Period Type:	instant

- Definition

Public warrants issued.

+ References

No definition available.

+ Details

Name:	bgl_PublicWarrantsIssued
Namespace Prefix:	bgl_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Royalty liabilities, discount rate.

+ References

No definition available.

+ Details

Name:	bgl_RoyaltyLiabilitiesDiscountRate
Namespace Prefix:	bgl_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 35
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481639/420-10-35-4

+ Details

Name:	us-gaap_AccretionExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 182
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-182

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B

+ Details

Name:	us-gaap_DerivativesFairValueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of expense (income) related to adjustment to fair value of warrant liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

+ Details

Name:	us-gaap_FairValueAdjustmentOfWarrants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Weighted-average risk-free rate used to discount claim liability for financial guarantee insurance contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-9

+ Details

Name:	us-gaap_FinancialGuaranteeInsuranceContractsClaimLiabilityWeightedAverageRiskFreeDiscountRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_WarrantsAndRightsOutstandingMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=bgl_PublicWarrantsLevelOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=us-gaap_WarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bgl_AugustNoteSPAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPriceVolatilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputExpectedTermMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=bgl_PurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=bgl_BGLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputRiskFreeInterestRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationTechniqueAxis=us-gaap_MonteCarloModelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Fair Value Measurement (Details)			6 Months Ended		12 Months Ended
Fair Value Measurement (Details)	May 24, 2024	May 15, 2024	Jun. 30, 2026 USD ($) shares oz MT	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) shares oz MT	Dec. 31, 2024 USD ($)	Sep. 03, 2025 shares
Fair Value Measurement [Line Items]
Average gold price (in Ounces)					2,006
Accretion expense \| $			$ 1,103,000		$ 1,910,000
Fair value of warrants (in Dollars) \| $			$ (3,738,650)		$ 4,613,800
Public Warrants Level One [Member]
Fair Value Measurement [Line Items]
Public warrants issued (in Shares) \| shares			11,500,000		11,500,000
Average gold price (in Ounces)			2,006		2,006
Gold production over life of mine mesaurement (in Ounces)			3,885.4		3,885.4
Ore Processed Measurement (in Millions of US Tons) \| MT			76.7		76.7
Royalty liabilities, discount rate			17.00%		17.00%
Warrant [Member]
Fair Value Measurement [Line Items]
Number of warrants issued (in Shares) \| shares							150,709
Warrant [Member] \| August Note SPA [Member]
Fair Value Measurement [Line Items]
Number of warrants issued (in Shares) \| shares			215,299		215,299
Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement [Line Items]
Average gold price (in Ounces)			2,006		2,006
Gold production over life of mine mesaurement (in Ounces)			3,885,400		3,885,400
Ore Processed Measurement (in Millions of US Tons) \| MT			76.7		76.7
Royalty liabilities, discount rate			10.00%		10.00%
Volatility [Member]
Fair Value Measurement [Line Items]
Warrants, measurement inputs					60
Expected Term [Member]
Fair Value Measurement [Line Items]
Warrants, measurement inputs					(65)
Purchase Agreement [Member]
Fair Value Measurement [Line Items]
Accretion expense \| $			$ 1,103,000	$ 871,000	$ 1,910,000	$ 1,037,000
BGL [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement [Line Items]
Remaining term					18 years 8 months 12 days
Discount rate					13.00%
Inflation rate					4.86%
Market risk premium rate					5.00%
BGL [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value Measurement [Line Items]
Remaining term	18 years 3 months 18 days	18 years 3 months 18 days
Discount rate	12.50%	12.50%
Inflation rate	4.65%	4.65%	4.65%
Market risk premium rate	5.50%	5.50%
BGL [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value Measurement [Line Items]
Remaining term						18 years 8 months 12 days
Discount rate						11.00%
Inflation rate						4.91%
Market risk premium rate						5.00%
Minimum [Member] \| Volatility [Member]
Fair Value Measurement [Line Items]
Warrants, measurement inputs			60
Minimum [Member] \| Rsk-free inierest Rate [Member]
Fair Value Measurement [Line Items]
Warrants, measurement inputs			3.6		3.6
Maximum [Member] \| Volatility [Member]
Fair Value Measurement [Line Items]
Warrants, measurement inputs			65
Maximum [Member] \| Rsk-free inierest Rate [Member]
Fair Value Measurement [Line Items]
Warrants, measurement inputs			3.7		3.7
Monte Carlo Pricing Model [Member]
Fair Value Measurement [Line Items]
Fair value of warrants (in Dollars) \| $			$ 799,888		$ 799,888