LEASES, Sublease Agreement (Details)		3 Months Ended	6 Months Ended
Apr. 18, 2019 Squarefeet	Jun. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)
LEASES [Abstract]
Currently rented area \| Squarefeet	999
Initial term of lease			8 years
Percentage of annual rent increase	2.25%
Future Lease Payments, Sublease Agreement [Abstract]
2021		$ 40,628	$ 40,628
2022		82,419	82,419
2023		84,194	84,194
2024		86,010	86,010
2025		87,867	87,867
Thereafter		74,590	74,590
Total		455,708	455,708
Sublease payments received		$ 21,045	$ 42,090	$ 40,054

The subleases rentable area for properties currently rented.

No definition available.

Name:	btx_AreaOfSubleaseSpaceCurrentlyRented
Namespace Prefix:	btx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of lessee's sublease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	btx_LesseeSubleaseTermOfContract
Namespace Prefix:	btx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of increase in annual lease payment for subleases for each year.

+ References

No definition available.

+ Details

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

- Definition

Amount of minimum sublease rentals to be received by the seller-lessee for sale-leaseback transactions accounted for using the deposit method or as a financing.

+ References

No definition available.

+ Details

Name:	btx_SaleLeasebackTransactionsFutureMinimumSubleaseRentals
Namespace Prefix:	btx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Amount of minimum sublease rentals for sale-leaseback transactions accounted for using the deposit method or as a financing to be received by the seller-lessee in the fourth fiscal year and thereafter following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

Name:	btx_SaleLeasebackTransactionsFutureMinimumSubleaseRentalsFourYearsThereafter
Namespace Prefix:	btx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of minimum sublease rentals for sale-leaseback transactions accounted for using the deposit method or as a financing to be received by the seller-lessee in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

Name:	btx_SaleLeasebackTransactionsFutureMinimumSubleaseRentalsNextTwelveMonths
Namespace Prefix:	btx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of minimum sublease rentals for sale-leaseback transactions accounted for using the deposit method or as a financing to be received by the seller-lessee in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

Name:	btx_SaleLeasebackTransactionsFutureMinimumSubleaseRentalsRemainderOfFiscalYear
Namespace Prefix:	btx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of minimum sublease rentals for sale-leaseback transactions accounted for using the deposit method or as a financing to be received by the seller-lessee in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

Name:	btx_SaleLeasebackTransactionsFutureMinimumSubleaseRentalsWithinFourYears
Namespace Prefix:	btx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of minimum sublease rentals for sale-leaseback transactions accounted for using the deposit method or as a financing to be received by the seller-lessee in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

Name:	btx_SaleLeasebackTransactionsFutureMinimumSubleaseRentalsWithinThreeYears
Namespace Prefix:	btx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of minimum sublease rentals for sale-leaseback transactions accounted for using the deposit method or as a financing to be received by the seller-lessee in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

Name:	btx_SaleLeasebackTransactionsFutureMinimumSubleaseRentalsWithinTwoYears
Namespace Prefix:	btx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Amount of sublease income excluding finance and operating lease expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 55
-Paragraph 53
-URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971

+ Details

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