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COMMITMENTS AND CONTINGENCIES, Royalty Agreements (Details)	Mar. 22, 2021	Jun. 22, 2018	May 01, 2012
Investor Royalty Agreement [Member]
Royalty Agreements [Abstract]
Percentage of royalty receive equal to revenues from sale of business	4.00%
Percentage of payment of additional royalty on gross sales			1.00%
Collaborator Royalty Agreement [Member]
Royalty Agreements [Abstract]
Percentage of royalty receive equal to revenues from sale of business		6.00%

X

- Definition

Percentage of additional royalty payable on gross sales by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	btx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of royalty receive equal to revenues generated from disposition of business.

+ References

No definition available.

+ Details

Name:	btx_PercentageOfRoyaltyReceiveEqualToRevenuesFromSaleOfBusiness
Namespace Prefix:	btx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	btx_RoyaltyAgreementsAbstract
Namespace Prefix:	btx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Details

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