Represents the current ratio (as defined in the Exit Credit Agreement).

No definition available.

Name:	batl_CurrentRatio
Namespace Prefix:	batl_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The threshold total net indebtedness leverage ratio under the debt instrument.

+ References

No definition available.

+ Details

Name:	batl_DebtInstrumentThresholdTotalNetIndebtednessLeverageRatio
Namespace Prefix:	batl_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of consecutive semi-annual redeterminations between which the entity and the lenders, each of whom have the right to a specified number of interim unscheduled redeterminations of the borrowing base under the credit facility.

+ References

No definition available.

+ Details

Name:	batl_LineOfCreditFacilityBorrowingBaseNumberOfConsecutiveSemiAnnualRedeterminationsBetweenWhichInterimUnscheduledRedeterminationIsAvailable
Namespace Prefix:	batl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of interim unscheduled redeterminations of borrowing base available to the entity and the lender under the credit facility.

+ References

No definition available.

+ Details

Name:	batl_LineOfCreditFacilityBorrowingBaseNumberOfInterimUnscheduledRedeterminationAvailable
Namespace Prefix:	batl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=batl_SeniorRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=batl_SuccessorSeniorRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=batl_FirstAmendmentToSeniorRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LONG TERM DEBT - Senior Facility (Details) $ in Thousands				1 Months Ended
LONG TERM DEBT - Senior Facility (Details) $ in Thousands	Nov. 21, 2019 USD ($)	Oct. 08, 2019 USD ($)	Sep. 07, 2017 USD ($) item	Dec. 31, 2019 USD ($) item	Oct. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Current and long-term debt
Debt				$ 144,000		$ 613,105
Senior revolving credit facility
Current and long-term debt
Maximum borrowing capacity			$ 1,000
Current borrowing capacity					$ 225,000
Amount available for issuance of letters of credit		$ 50,000
Number of interim unscheduled redeterminations of borrowing base to which the company and lender each have the right \| item			1
Number of consecutive semi-annual redeterminations between which the company and the lenders each have the right to one interim unscheduled redetermination of borrowing base \| item			2
Debt Instrument, Threshold Total Net Indebtedness Leverage Ratio	3.50
Senior revolving credit facility \| ABR-based \| Minimum
Current and long-term debt
Applicable margin (as a percent)		1.00%	1.75%
Senior revolving credit facility \| ABR-based \| Maximum
Current and long-term debt
Applicable margin (as a percent)			2.75%
Senior revolving credit facility \| LIBOR \| Minimum
Current and long-term debt
Applicable margin (as a percent)			2.75%
Senior revolving credit facility \| LIBOR \| Maximum
Current and long-term debt
Applicable margin (as a percent)			3.75%
Successor Senior revolving credit facility
Current and long-term debt
Debt				144,000
Maximum borrowing capacity		$ 750,000,000
Current borrowing capacity	$ 240,000			$ 144,000
Number of interim unscheduled redeterminations of borrowing base to which the company and lender each have the right \| item				1
Number of consecutive semi-annual redeterminations between which the company and the lenders each have the right to one interim unscheduled redetermination of borrowing base \| item				2
Letters of credit outstanding				$ 2,300
Borrowing capacity available				$ 93,700
Successor Senior revolving credit facility \| Minimum
Current and long-term debt
Current Ratio		1.00
Successor Senior revolving credit facility \| ABR-based \| Maximum
Current and long-term debt
Applicable margin (as a percent)		2.00%
Successor Senior revolving credit facility \| LIBOR \| Minimum
Current and long-term debt
Applicable margin (as a percent)		2.00%
Successor Senior revolving credit facility \| LIBOR \| Maximum
Current and long-term debt
Applicable margin (as a percent)		3.00%
First Amendment To Senior Revolving Credit Facility
Current and long-term debt
Current borrowing capacity	$ 240,000
Debt Instrument, Threshold Total Net Indebtedness Leverage Ratio	3.50