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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY (Parenthetical) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($)
Common stock, offering costs | $ 12,136

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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