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v3.23.3

Note 13 - ATM Program (Details Textual) | Aug. 10, 2022 USD ($)
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Series B Preferred Stock [Member] | Maximum [Member] |
Preferred Stock, Aggregate Offering Price | $ 100,000,000

X
- Definition Represents the aggregate offering price for preferred stock. + References No definition available. + Details
Name: | atlc_PreferredStockAggregateOfferingPrice
Namespace Prefix: | atlc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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