Name:	btx_EquityMethodOwnershipPercentageAfterPublicOffering
Namespace Prefix:	btx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Refers to the number of clinical stage programs on proprietary cell therapy platforms.

No definition available.

Name:	btx_NumberOfClinicalStagePrograms
Namespace Prefix:	btx_
Data Type:	xbrli:integerItemType
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Period Type:	duration

Refers to number of proprietary platform technologies having by the entity and subsidiaries.

No definition available.

Name:	btx_NumberOfPlatformTechnologies
Namespace Prefix:	btx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Refers to the number of primary sectors that targeted by the current clinical programs of the entity.

No definition available.

Name:	btx_NumberOfPrimarySectors
Namespace Prefix:	btx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Refers to number of subsidiaries owned by the parent company.

No definition available.

Name:	btx_NumberOfSubsidiaries
Namespace Prefix:	btx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
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Data Type:	num:percentItemType
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Period Type:	instant

- References

No definition available.

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
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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.

No definition available.

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

Name:	dei_LegalEntityAxis=btx_AsteriasBiotherapeuticsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	dei_LegalEntityAxis=btx_OncocyteCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
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