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Intangible Assets - Schedule of Activity (Details) - USD ($) $ in Thousands | 9 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Indefinite-Lived Intangible Assets [Roll Forward] |  |
Beginning balance | $ 202,044 | $ 151,169
Acquisitions | 11,042 | 9,159
Amount disposed | (32,402) | 0
Exchanges – licenses received | 41,250 | 13,107
Exchanges – licenses surrendered | (8,215) | (3,778)
Ending balance | $ 213,719 | $ 169,657

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- Definition Indefinitelived Intangible Assets, Exchanged Licenses Received + References No definition available. + Details
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Namespace Prefix: | atex_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Indefinitelived Intangible Assets, Exchanged Licenses Surrendered + References No definition available. + Details
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Namespace Prefix: | atex_
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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of divestiture of an asset lacking physical substance and having a projected indefinite period of benefit to fair value. Excludes financial assets and goodwill. + References No definition available. + Details
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- Definition Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration