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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY (Parenthetical) $ in Thousands	12 Months Ended
	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