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LEASES, Operating Lease (Details) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2022 USD ($) ft² | Mar. 05, 2022 USD ($) | Dec. 31, 2021 USD ($)
LEASES [Abstract] |  |  |
Operating lease area | ft² | 5,200 |  |
Lease term | 62 months |  |
Base rent (per square foot) | ft² | 6.35 |  |
Percentage of increase in base rent on each year | 3.00% |  |
Extended lease term | 5 years |  |
Commitment to purchase equipment |  | $ 50,000 |
Unamortized leasehold improvements |  | 50,000 |
Security deposit | $ 421,000 | $ 63,000 | $ 488,000

X
- Definition Amount of base rent expense per square foot for leased asset. + References No definition available. + Details
Name: | btx_BaseRentPerSquareFoot
Namespace Prefix: | btx_
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Balance Type: | na
Period Type: | duration

X
- Definition The amount of property for which lessee committed to purchase. + References No definition available. + Details
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Namespace Prefix: | btx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Area of leased property under operating lease. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

X
- Definition The percentage of base rent increase on each anniversary. + References No definition available. + Details
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Namespace Prefix: | btx_
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Balance Type: | na
Period Type: | instant

X
- Definition The amount of unamortized leasehold improvements. + References No definition available. + Details
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Balance Type: | debit
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X
- Definition The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8,17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
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X
- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980 + Details
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X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980 + Details
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