Area of Land, Contributed Real Estate

No definition available.

Name:	bhoi_AreaofLandContributedRealEstate
Namespace Prefix:	bhoi_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the pro forma bad debt expense for the period, as if the business combination or combinations had been completed at the beginning of a period.

+ References

No definition available.

+ Details

Name:	bhoi_BusinessAcquisitionsProFormaBadDebtExpenses
Namespace Prefix:	bhoi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Representing the pro forma costs incurred directly related to operations of owned hotels. For a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

No definition available.

+ Details

Name:	bhoi_BusinessAcquisitionsProFormaDirectCostsOfOwnedHotels
Namespace Prefix:	bhoi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the pro forma net income (loss) per share for the period, as if the business combination or combinations had been completed at the beginning of a period.

+ References

No definition available.

+ Details

Name:	bhoi_BusinessAcquisitionsProFormaNetIncomeLossPerShare
Namespace Prefix:	bhoi_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Representing the pro forma costs incurred and are directly related to generating revenues from leased and rented property or equipment. For a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

No definition available.

+ Details

Name:	bhoi_BusinessAcquisitionsProFormaPropertyOperatingExpense
Namespace Prefix:	bhoi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The pro forma revenue from real estate operations for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

No definition available.

+ Details

Name:	bhoi_BusinessAcquisitionsProFormaRealEstateRevenueNet
Namespace Prefix:	bhoi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The pro forma revenue from managing and operating of owned hotels for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

No definition available.

+ Details

Name:	bhoi_BusinessAcquisitionsProFormaRevenueFromOwnedHotels
Namespace Prefix:	bhoi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the number of building office complex.

+ References

No definition available.

+ Details

Name:	bhoi_NumberOfBuildingOfficeComplex
Namespace Prefix:	bhoi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of story in office building.

+ References

No definition available.

+ Details

Name:	bhoi_NumberOfStoryInOfficeBuilding
Namespace Prefix:	bhoi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of real estate owned.

+ References

No definition available.

+ Details

Name:	bhoi_PercentageOfRealEstateOwned
Namespace Prefix:	bhoi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Real Estate Property, Estimated Gross Construction Costs

+ References

No definition available.

+ Details

Name:	bhoi_RealEstatePropertyEstimatedGrossConstructionCosts
Namespace Prefix:	bhoi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Area of land held.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfLand
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

+ Details

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

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

+ Details

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

- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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

- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

+ Details

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629

+ Details

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

- Definition

The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.14(d))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

+ Details

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

- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

+ Details

Name:	us-gaap_ImpairmentOfInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2921-110230

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

+ Details

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

- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.12)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 9
-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 11
-Article 7

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percent of net assets at close of period. For schedules of investments that are categorized, each category has a percent of net assets for the aggregated value of the Investments in the category.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12.3)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-12C.Column D.2)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010

+ Details

Name:	us-gaap_InvestmentOwnedPercentOfNetAssets
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 13, 16
-Article 9

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

+ Details

Name:	us-gaap_NotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow for incremental, external costs directly pertaining to an early extinguishment of debt, including legal costs and prepayment penalties, and excluding interest and repayment of debt principal.

+ References

No definition available.

+ Details

Name:	us-gaap_PaymentsOfDebtExtinguishmentCosts
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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585

+ Details

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

- Definition

Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(d))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_RealEstateInvestmentPropertyAtCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

+ Details

Name:	us-gaap_RealEstateInvestmentPropertyNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

No definition available.

+ Details

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

- Definition

Revenue from the sale of commercial, industrial, or residential property during the period. This element is more likely than not relevant to an entity for which real estate operations are a principal activity. If real estate operations are not a principal activity, the reporting entity would likely use a gain (loss) on sale of property, plant, or equipment type element.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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

- Details

Name:	us-gaap_RealEstatePropertiesAxis=bhoi_LasColinasCommonsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=bhoi_NorthpointCentralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=bhoi_LodgeAndSpaAtCordilleraMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=bhoi_NorthboroughTowerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=bhoi_ChaseParkPlazaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=bhoi_FriscoSquareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=bhoi_RoyalIslandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=us-gaap_WhollyOwnedPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=us-gaap_ConsolidatedPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=bhoi_TheAblonatFriscoSquareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=bhoi_CentralEuropeJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_NoncontrollingInterestMember
Namespace Prefix:
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- Details

Name:	us-gaap_InformationByFinancialStatementLineItemAxis=us-gaap_EquityMethodInvestmentsMember
Namespace Prefix:
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Balance Type:
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- Details

Name:	us-gaap_RealEstatePropertiesAxis=us-gaap_UnconsolidatedPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=bhoi_ChaseParkPlazaHotelLLCMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_CoVenturerMember
Namespace Prefix:
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Name:	dei_LegalEntityAxis=bhoi_ChaseParkPlazaMember
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- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=bhoi_OfficeSpaceMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=bhoi_RetailSpaceMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=bhoi_MovieTheaterMember
Namespace Prefix:
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- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=us-gaap_OtherPropertyMember
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Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=bhoi_OtherRealEstatePropertiesMember
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Period Type:

Real Estate Investments (Details) $ / shares in Units, € in Millions									3 Months Ended								12 Months Ended
	Oct. 21, 2015 EUR (€)	Oct. 21, 2015 USD ($)	Aug. 20, 2015 USD ($)	Jul. 15, 2015 EUR (€)	Jul. 15, 2015 USD ($)	Feb. 01, 2015 EUR (€)	Feb. 01, 2015 USD ($)	Aug. 07, 2014	Dec. 31, 2015 USD ($) ft² a property unit	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 EUR (€) building story	Dec. 31, 2015 USD ($) ft² a building property unit story	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($) $ / shares	Sep. 02, 2014 USD ($)	Aug. 26, 2014 USD ($) a unit	Aug. 05, 2014	Jun. 13, 2014 a	Feb. 19, 2013	Jul. 28, 2008 property
Real estate Investments
Equity in losses of unconsolidated joint ventures																		$ 1,008,000	$ 170,000	$ (1,694,000)
Sales of Real Estate																		0	0	3,404,000
Gains (Losses) on Sales of Investment Real Estate									$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 476,000	$ 0		0	476,000	86,000
Payments of Debt Extinguishment Costs																		0	590,000	0
Gains (Losses) on Extinguishment of Debt																		0	(246,000)	0
Proceeds from sale of real estate \| €						€ 0.2
Impairment of Real Estate																		11,540,000	9,371,000	363,000
Impairment charge																		12,301,000	9,371,000	932,000
Real estate assets, net									230,727,000				229,300,000					230,727,000	229,300,000
Unaudited pro forma summary
Gain (Loss) on Sale of Properties			$ 100,000															0	476,000	86,000
Notes Payable									$ 155,547,000				153,556,000					$ 155,547,000	153,556,000
Las Colinas Commons [Member]
Real estate Investments
Investment Owned, Percent of Net Assets									100.00%									100.00%
Approximate rentable square footage \| ft²									239,000									239,000
Number of building office complex \| building																	3	3
Unaudited pro forma summary
Notes Payable									$ 14,900,000				11,484,000					$ 14,900,000	11,484,000
Northpoint Central
Real estate Investments
Investment Owned, Percent of Net Assets									100.00%									100.00%
Approximate rentable square footage \| ft²									180,000									180,000
Impairment of Real Estate										2,700,000								$ 2,700,000
Number of stories in office building \| story																	9	9
Unaudited pro forma summary
Notes Payable									$ 11,720,000				15,574,000					$ 11,720,000	15,574,000
The Lodge & Spa at Cordillera
Real estate Investments
Investment Owned, Percent of Net Assets									94.00%									94.00%
Northborough Tower [Member]
Real estate Investments
Investment Owned, Percent of Net Assets									100.00%									100.00%
Approximate rentable square footage \| ft²									207,000									207,000
Impairment of Real Estate										$ 2,100,000								$ 2,100,000	9,400,000
Number of stories in office building \| story																	14	14
Unaudited pro forma summary
Notes Payable									$ 18,516,000				19,071,000					$ 18,516,000	19,071,000
Chase Park Plaza [Member]
Real estate Investments
Investment Owned, Percent of Net Assets									100.00%									100.00%
Actual net loss of acquiree since acquisition date																				700,000
Unaudited pro forma summary
Rental revenue																				20,007,000
Hotel revenue																				33,313,000
Property operating expenses																				11,127,000
Hotel operating expenses																				25,331,000
Bad debt expense																				498,000
Net loss																				$ (18,537,000)
Net loss per share (in dollars per share) \| $ / shares																				$ (0.33)
Frisco Square [Member]
Unaudited pro forma summary
Area of Land, Contributed Real Estate \| a																								1.66
Number of condominium units remaining in inventory \| unit									114									114
Area of real estate property (in acres) \| a									27									27				3.4		1.62
Percentage of Real Estate Owned									100.00%									100.00%
Royal Island
Real estate Investments
Investment Owned, Percent of Net Assets									87.00%									87.00%
Approximate rentable square footage \| ft²									0									0
Ownership interest in the joint venture, non-controlling interest (as a percent)									12.71%									12.71%
Real estate assets, net									$ 0									$ 0
Unaudited pro forma summary
Notes Payable									$ 13,872,000				13,872,000					$ 13,872,000	13,872,000
Wholly owned properties
Real estate Investments
Number of properties \| property									4									4
Consolidated properties
Real estate Investments
Number of properties \| property									3									3
The Ablon at Frisco Square [Member]
Unaudited pro forma summary
Area of Land, Contributed Real Estate \| a									3.4									3.4				3.4
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest								90.00%									90.00%	90.00%
Number of condominium units remaining in inventory \| unit																						275
Real Estate Property, Estimated Gross Construction Costs																					$ 42,100,000
Face amount																						$ 26,300,000
Real Estate Investment Property, at Cost									$ 36,400,000									$ 36,400,000
Notes Payable									$ 18,679,000				$ 0					18,679,000	0
Central Europe Joint Venture
Real estate Investments
Equity in losses of unconsolidated joint ventures																		1,200,000		$ 2,800,000
Sales of Real Estate						€ 0.7	$ 900,000
Gains (Losses) on Sales of Investment Real Estate																	€ 0.1	100,000
Payments of Debt Extinguishment Costs \| €																	10.8
Extinguishment of Debt, Amount \| €																	12.6
Unaudited pro forma summary
Other than Temporary Impairment Losses, Investments																		$ 2,600,000	$ 0	$ 5,900,000
Noncontrolling Interest in Joint Venture \| Equity Method Investments [Member] \| Unconsolidated properties
Real estate Investments
Number of properties \| property									18									18								22
Chase Park Plaza Hotel LLC [Member]
Real estate Investments
Business Acquisition, Percentage of Voting Interests Acquired																							5.00%
Co-venturer [Member] \| Chase Park Plaza [Member]
Real estate Investments
Ownership interest in the joint venture, non-controlling interest (as a percent)																							5.00%		5.00%
Office Space [Member] \| Frisco Square [Member]
Real estate Investments
Approximate rentable square footage \| ft²									101,000									101,000
Retail Space [Member] \| Frisco Square [Member]
Real estate Investments
Approximate rentable square footage \| ft²									71,000									71,000
Movie Theater [Member] \| Frisco Square [Member]
Real estate Investments
Approximate rentable square footage \| ft²									41,500									41,500
Other Property [Member] \| Central Europe Joint Venture
Real estate Investments
Sales of Real Estate				€ 3.9	$ 4,300,000
Gains (Losses) on Sales of Investment Real Estate																	0.2	$ 200,000
Gains (Losses) on Extinguishment of Debt																	1.8	2,000,000
Proceeds from sale of real estate \| €				€ 1.4
Other Real Estate Properties [Member] \| Central Europe Joint Venture
Real estate Investments
Sales of Real Estate	€ 13.1	$ 14,800,000
Gains (Losses) on Sales of Investment Real Estate																	€ 2.5	2,800,000
Proceeds from sale of real estate \| €	€ 1.1
Fair Value, Measurements, Nonrecurring [Member]
Real estate Investments
Impairment of Real Estate																		$ 12,300,000