Fair Value Measurement (Details) - Schedule of assumptions used for the valuation of the warrants	12 Months Ended
Dec. 31, 2021
Minimum [Member] \| Blade Therapeutics, Inc. [Member]
Fair Value Measurement (Details) - Schedule of assumptions used for the valuation of the warrants [Line Items]
Dividend yield
Tranche obligation [Member]
Fair Value Measurement (Details) - Schedule of assumptions used for the valuation of the warrants [Line Items]
Risk-free interest rate	0.05%
Tranche obligation [Member] \| Minimum [Member] \| Blade Therapeutics, Inc. [Member]
Fair Value Measurement (Details) - Schedule of assumptions used for the valuation of the warrants [Line Items]
Risk-free interest rate	0.02%
Weighted-average expected term (years)	3 months
Weighted-average expected volatility	25.00%

No definition available.

Name:	biot_FairValueMeasurementDetailsScheduleofassumptionsusedforthevaluationofthewarrantsLineItems
Namespace Prefix:	biot_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate.

+ References

No definition available.

+ Details

Name:	biot_RiskfreeInterestRate
Namespace Prefix:	biot_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Rate of weighted-average expected volatility for award under share-based payment arrangement.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

Name:	srt_ConsolidatedEntitiesAxis=biot_BladeTherapeuticsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=biot_TrancheObligationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: