Incentive Units Participation Threshold

No definition available.

Name:	bbai_IncentiveUnitsParticipationThreshold
Namespace Prefix:	bbai_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Incentive Units Tranches

+ References

No definition available.

+ Details

Name:	bbai_IncentiveUnitsTranches
Namespace Prefix:	bbai_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage For Each Quarter

+ References

No definition available.

+ Details

Name:	bbai_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentageForEachQuarter
Namespace Prefix:	bbai_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Available to Vest Each Vesting Period

+ References

No definition available.

+ Details

Name:	bbai_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAvailableToVestEachVestingPeriod
Namespace Prefix:	bbai_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Payment Arrangement, Expense, Percentage

+ References

No definition available.

+ Details

Name:	bbai_ShareBasedPaymentArrangementExpensePercentage
Namespace Prefix:	bbai_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Payment Arrangement, Vesting Condition Modification, Number of Former Employees

+ References

No definition available.

+ Details

Name:	bbai_ShareBasedPaymentArrangementVestingConditionModificationNumberOfFormerEmployees
Namespace Prefix:	bbai_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

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.F)
-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ 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 (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ 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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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 (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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 (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ 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 (d)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

+ 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 (h)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of vesting of award under share-based payment arrangement.

+ 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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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

- Definition

Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

+ References

No definition available.

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the 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 (a)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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

- Details

Name:	us-gaap_PlanNameAxis=bbai_ClassBUnitIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=bbai_IncentiveUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=bbai_ShareBasedPaymentArrangementTrancheFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=bbai_BoardOfDirectorsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=bbai_ClassAUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=bbai_NonEmployeeDirectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Equity-Based Compensation - Narrative (Details) $ / shares in Units, $ in Thousands				1 Months Ended	3 Months Ended		5 Months Ended	12 Months Ended
	Mar. 30, 2022 $ / shares	Dec. 07, 2021 shares	Jul. 29, 2021 $ / shares	Feb. 28, 2021 tranche $ / shares	Mar. 31, 2022 USD ($) employee $ / shares shares	Mar. 31, 2021 USD ($)	Dec. 31, 2021	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment , expense					$ 3,858	$ 25
Options, fair value (usd per share) \| $ / shares					$ 7.00
Class B Unit Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in usd per share) \| $ / shares			$ 9.06
Incentive Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment , expense					$ 2,706
Share-based payment arrangement, expense, percentage					100.00%
Cost not yet recognized, period for recognition					1 year 9 months 29 days
Incentive Units \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period							30 months	25 months
Share-based payment arrangement, expense, percentage								17.00%
Number of former employees \| employee					1
Incremental cost					$ 219
Cost not yet recognized, amount					$ 19,957
Incentive Units \| Class B Unit Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive units participation threshold (usd per share) \| $ / shares				$ 1.00
Incentive units tranches \| tranche				3
Incentive Units \| Class B Unit Incentive Plan \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in usd per share) \| $ / shares				$ 5.19
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period					10 years
Cost not yet recognized, period for recognition					3 years 10 months 2 days
Options, fair value (usd per share) \| $ / shares	$ 4.67
Intrinsic value					$ 526
Unrecognized compensation costs					$ 4,236
Vesting period					4 years
Stock Options \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights, percentage					25.00%
Stock Options \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights, percentage for each quarter					6.25%
Stock Options \| Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights, percentage for each quarter					6.25%
Stock Options \| Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights, percentage for each quarter					6.25%
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in usd per share) \| $ / shares					$ 5.32
Cost not yet recognized, amount					$ 17,608
Cost not yet recognized, period for recognition					3 years 8 months 1 day
Granted (in shares) \| shares					2,836,023
Vesting period					4 years
Restricted Stock Units (RSUs) \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights, percentage					25.00%
Restricted Stock Units (RSUs) \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights, percentage for each quarter					6.25%
Restricted Stock Units (RSUs) \| Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights, percentage for each quarter					6.25%
Restricted Stock Units (RSUs) \| Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights, percentage for each quarter					6.25%
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment , expense					$ 103
Granted (in usd per share) \| $ / shares					$ 0
Cost not yet recognized, amount					$ 248
Cost not yet recognized, period for recognition					8 months 15 days
Granted (in shares) \| shares					0
Vesting period		4 years
Shares available to vest each vesting period (in shares) \| shares		37,500
Stock compensation expense in selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment , expense					$ 3,071	25
Stock compensation expense in selling, general and administrative \| Incentive Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment , expense					2,353
Stock compensation expense in cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment , expense					700	0
Stock compensation expense in cost of revenues \| Incentive Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment , expense					353
Board of Directors \| Stock compensation expense in selling, general and administrative \| Class A Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment , expense					$ 0	$ 25
Non-employee Director \| Restricted Stock Units (RSUs) \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights, percentage					100.00%
Vesting period					1 year