Number of real estate assets held for sale at the end of the reporting period.

No definition available.

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Namespace Prefix:	bhm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of units encumbered in real estate property.

+ References

No definition available.

+ Details

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Namespace Prefix:	bhm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of units sold in real estate properties.

+ References

No definition available.

+ Details

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Namespace Prefix:	bhm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of sale of real estate properties.

+ References

No definition available.

+ Details

Name:	bhm_ProceedsFromSaleOfRealEstateGross
Namespace Prefix:	bhm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(9)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
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-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(13))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

+ Details

Name:	us-gaap_GainOnSaleOfInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ 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
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+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-2

+ Details

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

- Definition

Mortgage loan related to property sales in noncash investing and financing activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
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-SubTopic 10
-Section 50
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-URI https://asc.fasb.org/1943274/2147482913/230-10-50-5

+ Details

Name:	us-gaap_MortgageLoanRelatedToPropertySales1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
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Name:	us-gaap_PaymentsToAcquireInterestInJointVenture
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Cash received for the sale of real estate that is not part of an investing activity during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-Subparagraph (c)
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-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

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

- 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

No definition available.

+ Details

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

- Details

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- Details

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- Details

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Balance Type:
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Sale of Real Estate Assets and Held for Sale Real Estate Assets (Details) $ in Thousands			12 Months Ended
	Aug. 07, 2024 USD ($)	Aug. 06, 2024 USD ($)	Dec. 31, 2025 USD ($) item	Dec. 31, 2024 USD ($) item
Sale of Real Estate Assets and Held for Sale Real Estate Assets
Classified as held for sale \| item			107	167
Loss on extinguishment of debt \| $			$ (27)	$ (151)
Impairment of held for sale real estate \| $			$ 2,100	$ 3,300
ILE
Sale of Real Estate Assets and Held for Sale Real Estate Assets
Number of units sold in real estate properties \| item			28	4
Number of units encumbered \| item			27	4
Mortgage loan related to property sales \| $			$ 4,900	$ 900
Classified as held for sale \| item			27
Indy Springfield Portfolio
Sale of Real Estate Assets and Held for Sale Real Estate Assets
Number of units sold in real estate properties \| item			19	11
Classified as held for sale \| item			18
Peak JV 2 portfolio
Sale of Real Estate Assets and Held for Sale Real Estate Assets
Number of units sold in real estate properties \| item			24	23
Classified as held for sale \| item			8
Impairment of held for sale real estate \| $				$ 1,400
Peak JV 3 portfolio
Sale of Real Estate Assets and Held for Sale Real Estate Assets
Number of units sold in real estate properties \| item			48	60
Classified as held for sale \| item			42
ILE, Indy-Springfield, Peak JV2 and JV3 Portfolio
Sale of Real Estate Assets and Held for Sale Real Estate Assets
Number of units sold in real estate properties \| item			127	98
Aggregate sale of real estate transactions \| $			$ 23,500	$ 15,300
Net proceeds from sale of units in real estate \| $			16,600	13,500
Gain on sale of real estate investments \| $			$ 1,700	$ 1,800
Navigator Villas
Sale of Real Estate Assets and Held for Sale Real Estate Assets
Aggregate sale of real estate transactions \| $	$ 36,400
Mortgage loan related to property sales \| $	19,500
Net proceeds from sale of units in real estate \| $	12,700
Gain on sale of real estate investments \| $	10,000
Cash payment \| $		$ 2,900
Loss on extinguishment of debt \| $	$ 100
Golden Pacific
Sale of Real Estate Assets and Held for Sale Real Estate Assets
Number of units sold in real estate properties \| item			8
Classified as held for sale \| item			12