XML 52 R42.htm IDEA: XBRL DOCUMENT
v3.21.1

LEASES (Details) | 3 Months Ended
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Mar. 31, 2021
Operating Lease [Abstract] |
Percentage of increase in annual lease rent | 3.00%
Lease expiration date | Dec. 31, 2025
Minimum [Member] |
Operating Lease [Abstract] |
Lease remaining terms | 5 years
Maximum [Member] |
Operating Lease [Abstract] |
Lease remaining terms | 6 years

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- Definition Percentage of increase in annual lease rent payment for operating leases for each year. + References No definition available. + Details
Name: | btx_LesseeOperatingLeasePercentageOfIncreaseInAnnualLeaseRent
Namespace Prefix: | btx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Date which lease or group of leases is set to expire, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_LeaseExpirationDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_LesseeOperatingLeaseDescriptionAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Remaining lease term of 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)(1) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseRemainingLeaseTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |