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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended
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Sep. 30, 2023 | Jun. 30, 2023
Common stock, offering costs | $ 307 | $ 2,489

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- Definition Common stock offering costs. + References No definition available. + Details
Name: | atec_CommonStockOfferingCosts
Namespace Prefix: | atec_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration