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Leases - Narrative (Details) | Mar. 31, 2025 | Sep. 30, 2021 | Dec. 31, 2020
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Lease [Line Items] |  |  |
Lease extension |  | 10 years | 10 years
Minimum |  |  |
Lease [Line Items] |  |  |
Lease extension | 3 years |  |
Maximum |  |  |
Lease [Line Items] |  |  |
Lease extension | 10 years |  |

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- Definition Lease [Line Items] + References No definition available. + Details
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Namespace Prefix: | atex_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Term of lessor's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-3 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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