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v3.21.2

FINANCIAL STATEMENT PRESENTATION - Change in Estimate (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2020 USD ($)
Change in Estimate |
Reduction of discretionary cash incentives | $ 1.6

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- Definition Reduction of discretionary cash incentives + References No definition available. + Details
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Namespace Prefix: | batl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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